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A215404 as a simple table

n a(n)
0 0
1 0
2 1
3 4
4 13
5 39
6 113
7 322
8 910
9 2561
10 7192
11 20175
12 56563
13 158535
14 444276
15 1244936
16 3488381
17 9774440
18 27387681
19 76739023
20 215018609
21 602469686
22 1688083894
23 4729907909
24 13252910268
25 37133833451
26 104046695091
27 291532369743
28 816855560248
29 2288778436672
30 6413014696201

[0,0,1,4,13,39,113,322,910,2561,7192,20175,56563,
 158535,444276,1244936,3488381,9774440,27387681,
 76739023,215018609,602469686,1688083894,
 4729907909,13252910268,37133833451,104046695091,
 291532369743,816855560248,2288778436672,
 6413014696201]

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Last modified April 23 03:30 EDT 2024. Contains 371906 sequences. (Running on oeis4.)