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A117813 as a simple table

n a(n)
0 1
1 0
2 6
3 18
4 122
5 600
6 3450
7 18914
8 107338
9 606816
10 3466356
11 19852470
12 114239642
13 659275760
14 3815952426
15 22138925718
16 128718762250
17 749773729952
18 4374616990332
19 25561798008252
20 149562047056572
21 876140945014640
22 5138089929141890
23 30162194533001982

[1,0,6,18,122,600,3450,18914,107338,606816,
 3466356,19852470,114239642,659275760,3815952426,
 22138925718,128718762250,749773729952,
 4374616990332,25561798008252,149562047056572,
 876140945014640,5138089929141890,
 30162194533001982]

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Last modified April 13 03:15 EDT 2024. Contains 371639 sequences. (Running on oeis4.)