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A199420 as a simple table

n a(n)
0 2
1 12
2 82
3 572
4 4002
5 28012
6 196082
7 1372572
8 9608002
9 67256012
10 470792082
11 3295544572
12 23068812002
13 161481684012
14 1130371788082
15 7912602516572
16 55388217616002
17 387717523312012
18 2714022663184082
19 18998158642288572

[2,12,82,572,4002,28012,196082,1372572,9608002,
 67256012,470792082,3295544572,23068812002,
 161481684012,1130371788082,7912602516572,
 55388217616002,387717523312012,2714022663184082,
 18998158642288572]

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Last modified March 3 17:29 EST 2024. Contains 370512 sequences. (Running on oeis4.)