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A056306 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 1
6 3
7 20
8 136
9 773
10 4280
11 22430
12 115097
13 577577
14 2863207
15 14051163
16 68515378
17 332514803
18 1608799915
19 7767857090
20 37460384315
21 180536313527
22 869901375049
23 4192038616700
24 20208367780744

[0,0,0,0,1,3,20,136,773,4280,22430,115097,577577,
 2863207,14051163,68515378,332514803,1608799915,
 7767857090,37460384315,180536313527,869901375049,
 4192038616700,20208367780744]

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Last modified April 25 11:16 EDT 2024. Contains 371967 sequences. (Running on oeis4.)