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A275487 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 0
5 0
6 0
7 1
8 1
9 1
10 2
11 2
12 3
13 6
14 25
15 66
16 134
17 266
18 505
19 952
20 1850
21 3515
22 6643
23 12920
24 26893
25 55786
26 114992
27 234719
28 473299
29 946406
30 1884728
31 3754316
32 7467998
33 14845968

[0,0,0,0,0,0,0,1,1,1,2,2,3,6,25,66,134,266,505,
 952,1850,3515,6643,12920,26893,55786,114992,
 234719,473299,946406,1884728,3754316,7467998,
 14845968]

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Last modified October 14 09:57 EDT 2019. Contains 327995 sequences. (Running on oeis4.)