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A005977 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 1
6 2
7 7
8 31
9 168
10 1025
11 7013
12 52495
13 425213
14 3696032
15 34291937
16 338161526
17 3532185118
18 38963334652
19 452704892533
20 5526901638291
21 70746674291507 

[0,0,0,0,1,2,7,31,168,1025,7013,52495,425213,
 3696032,34291937,338161526,3532185118,38963334652,
 452704892533,5526901638291,70746674291507]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)