A088792 - OEIS

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A088792 as a simple table

n	a(n)
0	1
1	1
2	2
3	7
4	38
5	279
6	2535
7	27106
8	330998
9	4526827
10	68402684
11	1130591607
12	20282026273
13	392427087780
14	8146462590683
15	180629845193090
16	4261044215912232
17	106571080784076813
18	2817142524095598771

[1,1,2,7,38,279,2535,27106,330998,4526827, 68402684,1130591607,20282026273,392427087780, 8146462590683,180629845193090,4261044215912232, 106571080784076813,2817142524095598771]