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A217526 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 0
5 2
6 6
7 18
8 47
9 123
10 318
11 830
12 2182
13 5792
14 15504
15 41828
16 113626
17 310564
18 853458
19 2356770
20 6536372
21 18199274
22 50852008
23 142547548
24 400763211
25 1129760403
26 3192727784
27 9043402488
28 25669818462
29 73007772788
30 208023278194
31 593742784814
32 1697385471195

[0,0,0,0,0,2,6,18,47,123,318,830,2182,5792,15504,
 41828,113626,310564,853458,2356770,6536372,
 18199274,50852008,142547548,400763211,1129760403,
 3192727784,9043402488,25669818462,73007772788,
 208023278194,593742784814,1697385471195]

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)