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A131620 as a simple table

n a(n)
0 1
1 0
2 8
3 27
4 55
5 240
6 701
7 1909
8 5753
9 15747
10 41138
11 104762
12 252664
13 580609
14 1274691
15 2665295
16 5315469
17 10113564
18 18353698
19 31781680
20 52486460
21 82606895
22 123821091
23 176518711
24 238906435
25 306378988
26 371328696
27 423932616

[1,0,8,27,55,240,701,1909,5753,15747,41138,104762,
 252664,580609,1274691,2665295,5315469,10113564,
 18353698,31781680,52486460,82606895,123821091,
 176518711,238906435,306378988,371328696,423932616]

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)