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A177447 as a simple table

n a(n)
0 1
1 1
2 1
3 3
4 18
5 172
6 2313
7 40626
8 887326
9 23282964
10 715540140
11 25259729071
12 1008721104654
13 45008479039824
14 2221170817590696
15 120209722115431950
16 7083266027910364710
17 451620678137942740132
18 30990400538494184551692
19 2277988537997377457967690
20 178626191260072536476398000

[1,1,1,3,18,172,2313,40626,887326,23282964,
 715540140,25259729071,1008721104654,
 45008479039824,2221170817590696,
 120209722115431950,7083266027910364710,
 451620678137942740132,30990400538494184551692,
 2277988537997377457967690,
 178626191260072536476398000]

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Last modified March 29 10:59 EDT 2024. Contains 371277 sequences. (Running on oeis4.)