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A247411 as a simple table

n a(n)
1 0
2 40
3 864
4 69976
5 1044356
6 9228900
7 56865236
8 311386556
9 1306471352
10 5072526324
11 16781511756
12 50442813960
13 137671413776
14 352319727008
15 836231888980
16 1886773303796
17 4029623018176
18 8248006141736
19 16180831379824
20 30699935052184

[0,40,864,69976,1044356,9228900,56865236,
 311386556,1306471352,5072526324,16781511756,
 50442813960,137671413776,352319727008,
 836231888980,1886773303796,4029623018176,
 8248006141736,16180831379824,30699935052184]

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Last modified April 18 15:05 EDT 2024. Contains 371780 sequences. (Running on oeis4.)