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A002903 as a simple table

n a(n)
1 1
2 4
3 28
4 196
5 1324
6 8980
7 60028
8 402412
9 2675860
10 17826340
11 118145548
12 784024780
13 5184334996
14 34313323804
15 226516271020
16 1496391824212

[1,4,28,196,1324,8980,60028,402412,2675860,
 17826340,118145548,784024780,5184334996,
 34313323804,226516271020,1496391824212]

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Last modified August 4 16:34 EDT 2020. Contains 336202 sequences. (Running on oeis4.)