A229696 - OEIS

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A229696 as a simple table

n	a(n)
1	0
2	40
3	626
4	5077
5	35825
6	230383
7	1400413
8	8184819
9	46455457
10	257724695
11	1403839397
12	7532391243
13	39908047865
14	209177764015
15	1086276818845
16	5595663437379
17	28620024582289
18	145460267764487
19	735134318022101

[0,40,626,5077,35825,230383,1400413,8184819, 46455457,257724695,1403839397,7532391243, 39908047865,209177764015,1086276818845, 5595663437379,28620024582289,145460267764487, 735134318022101]