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A140918 as a simple table

n a(n)
0 1
1 220
2 15730
3 572572
4 13026013
5 208416208
6 2530768240
7 24584605760
8 198520691512
9 1371597504992
10 8291930371088
11 44648855844320
12 217233856319480
13 966332582836544
14 3968865965221520
15 15175075749376400
16 54395951675154375
17 183902102876992500

[1,220,15730,572572,13026013,208416208,2530768240,
 24584605760,198520691512,1371597504992,
 8291930371088,44648855844320,217233856319480,
 966332582836544,3968865965221520,
 15175075749376400,54395951675154375,
 183902102876992500]

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Last modified November 28 13:47 EST 2021. Contains 349413 sequences. (Running on oeis4.)