28edt

This is the simplest edt which intelligibly doubles the Anti-BP harmonic chain. It is a schismatic temperament, albeit a really strange one due to being a multiple of 4edt and being index-2 in BP.

It is very close to every third step of 53edo.

Degree	cents	hekts	notation
1/28	67.93	46.429	Cq/D\\y
2/28	135.85	92.857	Cp/D\\
3/28	203.78	139.286	Cpq/Dy
4/28	271.71	185.714	D
5/28	339.635	232.143	Dp/Ey
6/28	407.56	278.571	E
7/28	475.49	325	Epq/F\\y
8/28	543.42	371.429	Ep/F\\
9/28	611.34	417.857	Eq/Fy
10/28	679.27	464.286	F
11/28	747.2	510.714	Fq/Gy
12/28	815.12	557.143	G
13/28	883.05	603.571	Gq/H\\y
14/28	950.98	650	Gp/H\\
15/28	1018.9	696.429	Gpq/Hy
16/28	1086.83	742.857	H
17/28	1154.76	789.286	Hq/Jy
18/28	1222.685	835.714	J
19/28	1290.61	882.143	Jq/A\\y
20/28	1358.54	928.571	Jp/A\\
21/28	1426.47	975	Jpq/Ay
22/28	1494.39	1021.429	A
23/28	1562.32	1067.857	Aq/B\\y
24/28	1630.25	1114.286	Ap/B\\
25/28	1698.17	1160.714	Apq/By
26/28	1766.1	1207.143	B
27/28	1834.03	1253.571	Bq/Cy
28/28	1901.955	1300	C

NonOctave Melancholic by Carlo Serafini (blog entry)