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A281569 as a simple table

n a(n)
1 0
2 1508
3 62882
4 162919
5 430995
6 919632
7 1818257
8 3326246
9 5744641
10 9601436
11 15859355
12 26033851
13 42510000
14 69365630
15 113056482
16 183794484
17 298249938
18 483393766
19 782278654
20 1263834968
21 2038915696
22 3284498896
23 5282364942

[0,1508,62882,162919,430995,919632,1818257,
 3326246,5744641,9601436,15859355,26033851,
 42510000,69365630,113056482,183794484,298249938,
 483393766,782278654,1263834968,2038915696,
 3284498896,5282364942]

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Last modified December 4 05:56 EST 2021. Contains 349470 sequences. (Running on oeis4.)