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A303731 as a simple table

n a(n)
0 1
1 0
2 1
3 1
4 1
5 5
6 6
7 27
8 53
9 140
10 649
11 1297
12 6355
13 18038
14 63226
15 241741
16 744711
17 3008107
18 10028056
19 37270169
20 138083464
21 488933323
22 1872525356
23 6763888465
24 25498771059
25 95467533318
26 355595703773
27 1353873044078
28 5077809606803
29 19345857682140
30 73533468653115

[1,0,1,1,1,5,6,27,53,140,649,1297,6355,18038,
 63226,241741,744711,3008107,10028056,37270169,
 138083464,488933323,1872525356,6763888465,
 25498771059,95467533318,355595703773,
 1353873044078,5077809606803,19345857682140,
 73533468653115]

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Last modified July 21 00:49 EDT 2019. Contains 325189 sequences. (Running on oeis4.)