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A231200 as a simple table

n a(n)
0 0
1 2
2 8
3 24
4 72
5 240
6 924
7 4116
8 20944
9 119952
10 763540
11 5346748
12 40845816
13 338041704
14 3012855356
15 28770647220
16 293055401888
17 3171602665696
18 36343889387172
19 439607533130732
20 5597256953340360
21 74829813397495128
22 1048039052970587788
23 15345654816688856484

[0,2,8,24,72,240,924,4116,20944,119952,763540,
 5346748,40845816,338041704,3012855356,28770647220,
 293055401888,3171602665696,36343889387172,
 439607533130732,5597256953340360,
 74829813397495128,1048039052970587788,
 15345654816688856484]

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Last modified April 24 15:42 EDT 2024. Contains 371960 sequences. (Running on oeis4.)