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A217246 as a simple table

n a(n)
1 1
2 1
3 0
4 1
5 0
6 1
7 0
8 3
9 3
10 13
11 21
12 110
13 474
14 2545
15 18696
16 136749
17 1447003
18 18772435
19 303050079
20 6239596472 

[1,1,0,1,0,1,0,3,3,13,21,110,474,2545,18696,
 136749,1447003,18772435,303050079,6239596472]

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Last modified April 24 11:49 EDT 2024. Contains 371936 sequences. (Running on oeis4.)