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A253448 as a simple table

n a(n)
1 81
2 1975
3 7782
4 15730
5 44242
6 147332
7 526430
8 1956194
9 7444718
10 28766354
11 112273790
12 441202754
13 1742089358

[81,1975,7782,15730,44242,147332,526430,1956194,
 7444718,28766354,112273790,441202754,1742089358]

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Last modified July 25 19:28 EDT 2021. Contains 346291 sequences. (Running on oeis4.)