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A251793 as a simple table

n a(n)
1 0
2 2
3 68
4 286
5 6760
6 28122
7 662508
8 2755766
9 64919120
10 270037042
11 6361411348
12 26460874446
13 623353393080
14 2592895658762
15 61082271110588
16 254077313684326
17 5985439215444640
18 24896983845405282
19 586511960842464228
20 2439650339536033406 

[0,2,68,286,6760,28122,662508,2755766,64919120,
 270037042,6361411348,26460874446,623353393080,
 2592895658762,61082271110588,254077313684326,
 5985439215444640,24896983845405282,
 586511960842464228,2439650339536033406]

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Last modified April 23 06:45 EDT 2024. Contains 371906 sequences. (Running on oeis4.)