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A215707 as a simple table

n a(n)
0 1
1 1
2 6
3 33
4 228
5 1880
6 17742
7 187124
8 2176360
9 27617616
10 378764280
11 5574170712
12 87491513304
13 1457433784560
14 25654258467432
15 475431102931080
16 9246150139382400
17 188172595998890688
18 3997389233216787264
19 88440294467474068608
20 2033755519425292281600

[1,1,6,33,228,1880,17742,187124,2176360,27617616,
 378764280,5574170712,87491513304,1457433784560,
 25654258467432,475431102931080,9246150139382400,
 188172595998890688,3997389233216787264,
 88440294467474068608,2033755519425292281600]

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)