A071261 - OEIS

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A071261 as a simple table

n	a(n)
1	1
2	10
3	37
4	206
5	1401
6	10626
7	85316
8	712597
9	6117420
10	53593619
11	476889480
12	4295913223
13	39084524707
14	358521889961
15	3311439169717
16	30765562102926
17	287282165065268
18	2694418859703791
19	25368958219747617

[1,10,37,206,1401,10626,85316,712597,6117420, 53593619,476889480,4295913223,39084524707, 358521889961,3311439169717,30765562102926, 287282165065268,2694418859703791, 25368958219747617]