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A024446 as a simple table

n a(n)
0 1
1 31
2 638
3 10982
4 171171
5 2506917
6 35201776
7 479688604
8 6392929061
9 83765551883
10 1083070611714
11 13855878102066
12 175736023769671
13 2213065674408529
14 27704146634051252
15 345076242383014568
16 4279844990866901001
17 52886642197647118455
18 651455131567317021190

[1,31,638,10982,171171,2506917,35201776,479688604,
 6392929061,83765551883,1083070611714,
 13855878102066,175736023769671,2213065674408529,
 27704146634051252,345076242383014568,
 4279844990866901001,52886642197647118455,
 651455131567317021190]

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Last modified December 6 22:42 EST 2021. Contains 349567 sequences. (Running on oeis4.)