A201340 - OEIS

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A201340 as a simple table

n	a(n)
1	0
2	0
3	15
4	213
5	2007
6	15497
7	106589
8	680287
9	4118949
10	23981337
11	135473879
12	747163898
13	4040984182
14	21504391182
15	112888169123
16	585765427216
17	3009175376793
18	15324419276531
19	77445651022458
20	388752941316532

[0,0,15,213,2007,15497,106589,680287,4118949, 23981337,135473879,747163898,4040984182, 21504391182,112888169123,585765427216, 3009175376793,15324419276531,77445651022458, 388752941316532]

[0,0,15,213,2007,15497,106589,680287,4118949,
 23981337,135473879,747163898,4040984182,
 21504391182,112888169123,585765427216,
 3009175376793,15324419276531,77445651022458,
 388752941316532]