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A057712 as a simple table

n a(n)
1 1
2 4
3 13
4 60
5 276
6 1416
7 7201
8 37972
9 201989
10 1089815
11 5929666
12 32533673
13 179657435 

[1,4,13,60,276,1416,7201,37972,201989,1089815,
 5929666,32533673,179657435]

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Last modified April 17 21:22 EDT 2024. Contains 371767 sequences. (Running on oeis4.)