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A321957 as a simple table

n a(n)
0 0
1 4
2 42
3 382
4 3302
5 27824
6 230964
7 1898712
8 15505590
9 126025204
10 1020732722
11 8245721686
12 66477664088
13 535118039200
14 4302260308416
15 34556369687312
16 277350672112822
17 2224673611151996
18 17835746776558638
19 142937183041928874
20 1145145456194522262
21 9171991364052010176

[0,4,42,382,3302,27824,230964,1898712,15505590,
 126025204,1020732722,8245721686,66477664088,
 535118039200,4302260308416,34556369687312,
 277350672112822,2224673611151996,
 17835746776558638,142937183041928874,
 1145145456194522262,9171991364052010176]

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Last modified June 16 05:29 EDT 2024. Contains 373423 sequences. (Running on oeis4.)