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Harmonic series with harmonics stretched by 0.25% per octave:
{| class="wikitable center-1 right-2"
{{Powharmonic series|128|expo=1.0025|prec=4}}
|+ style="font-size: 105%;" | Interval chain for {{frac|2|7}}-comma [[superpyth]]
{{Harmonics in equal|311|intervals=odd|prec=2|columns=15}}
|-
{{Harmonics in equal|3159811|intervals=odd|prec=2|columns=31}}
! rowspan="2" | # !! rowspan="2" | Cents !! colspan="2" | Approximate Ratios
{{Harmonics in equal|42586208631|intervals=odd|prec=2|columns=63}}
|-
! 7-limit !! 11-limit
|-
| −10 || {{cents|2^6/(3/2*(64/63)^(2/7))^10|3}} || 16/15, 21/20 ||
|-
| −9 || {{cents|2^6/(3/2*(64/63)^(2/7))^9|3}} || 8/5 ||
|-
| −8 || {{cents|2^5/(3/2*(64/63)^(2/7))^8|3}} || 6/5 || 40/33
|-
| −7 || {{cents|2^5/(3/2*(64/63)^(2/7))^7|3}} || 9/5 || 20/11
|-
| −6 || {{cents|2^4/(3/2*(64/63)^(2/7))^6|3}} || 48/35, 27/20 || 15/11
|-
| −5 || {{cents|2^3/(3/2*(64/63)^(2/7))^5|3}} || 28/27, 36/35 || 45/44
|-
| −4 || {{cents|2^3/(3/2*(64/63)^(2/7))^4|3}} || 14/9 ||
|-
| −3 || {{cents|2^2/(3/2*(64/63)^(2/7))^3|3}} || 7/6 ||
|-
| −2 || {{cents|2^2/(3/2*(64/63)^(2/7))^2|3}} || 7/4, 16/9 ||
|-
| −1 || {{cents|2/(3/2*(64/63)^(2/7))|3}} || 4/3 ||
|-
| 0 || 0 || '''1/1''' ||
|-
| 1 || {{cents|3/2*(64/63)^(2/7)|3}} || '''3/2''' ||
|-
| 2 || {{cents|(3/2*(64/63)^(2/7))^2/2|3}} || '''8/7''', '''9/8''' ||
|-
| 3 || {{cents|(3/2*(64/63)^(2/7))^3/2|3}} || 12/7 ||
|-
| 4 || {{cents|(3/2*(64/63)^(2/7))^4/2^2|3}} || 9/7 ||
|-
| 5 || {{cents|(3/2*(64/63)^(2/7))^5/2^2|3}} || 27/14, 35/18 || 88/45
|-
| 6 || {{cents|(3/2*(64/63)^(2/7))^6/2^3|3}} || 35/24, 40/27 || 22/15
|-
| 7 || {{cents|(3/2*(64/63)^(2/7))^7/2^4|3}} || 10/9 || 11/10
|-
| 8 || {{cents|(3/2*(64/63)^(2/7))^8/2^4|3}} || 5/3 || 33/20
|-
| 9 || {{cents|(3/2*(64/63)^(2/7))^9/2^5|3}} || '''5/4''' ||
|-
| 10 || {{cents|(3/2*(64/63)^(2/7))^10/2^5|3}} || 15/8, 40/21 ||
|-
| 11 || {{cents|(3/2*(64/63)^(2/7))^11/2^6|3}} || 10/7 ||
|-
| 12 || {{cents|(3/2*(64/63)^(2/7))^12/2^7|3}} || 15/14 ||
|-
| 13 || {{cents|(3/2*(64/63)^(2/7))^13/2^7|3}} || 45/28 || 44/27
|-
| 14 || {{cents|(3/2*(64/63)^(2/7))^14/2^8|3}} || 60/49 || 11/9
|-
| 15 || {{cents|(3/2*(64/63)^(2/7))^15/2^8|3}} || 50/27 || 11/6
|-
| 16 || {{cents|(3/2*(64/63)^(2/7))^16/2^9|3}} || 25/18 || '''11/8'''
|-
| 17 || {{cents|(3/2*(64/63)^(2/7))^17/2^10|3}} || 25/24 || 22/21, 33/32
|}
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