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A151520 as a simple table

n a(n)
1 1
2 4
3 6
4 21
5 47
6 134
7 323
8 876
9 2224
10 5885
11 15146
12 39574
13 102250
14 265574
15 686208
16 1775646
17 4583718
18 11835037
19 30515520
20 78652647 

[1,4,6,21,47,134,323,876,2224,5885,15146,39574,
 102250,265574,686208,1775646,4583718,11835037,
 30515520,78652647]

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Last modified June 4 19:35 EDT 2024. Contains 373102 sequences. (Running on oeis4.)