A272962 - OEIS

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A272962 as a simple table

n	a(n)
1	1
2	1
3	9
4	8
5	12
6	58
7	367
8	1952
9	10854
10	28952
11	111036
12	509073
13	1987399
14	7893688
15	31529461
16	127809627
17	503908003
18	2046633068
19	8290122978
20	32995116709
21	132715051945
22	535961114544

[1,1,9,8,12,58,367,1952,10854,28952,111036,509073, 1987399,7893688,31529461,127809627,503908003, 2046633068,8290122978,32995116709,132715051945, 535961114544]