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A265952 as a simple table

n a(n)
0 1
1 1
2 4
3 21
4 136
5 1045
6 9396
7 99379
8 1161952
9 14904873
10 208925380
11 3207759511
12 53349017184
13 950481426349
14 17959336305652
15 360094085423115
16 7656053670162496
17 172173524035504849
18 4077253037751090948
19 101263725993658291615
20 2627592803013505930240

[1,1,4,21,136,1045,9396,99379,1161952,14904873,
 208925380,3207759511,53349017184,950481426349,
 17959336305652,360094085423115,7656053670162496,
 172173524035504849,4077253037751090948,
 101263725993658291615,2627592803013505930240]

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Last modified October 26 08:00 EDT 2021. Contains 348267 sequences. (Running on oeis4.)