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A306511 as a simple table

n a(n)
0 0
1 0
2 1
3 4
4 19
5 99
6 603
7 4248
8 34115
9 307875
10 3085203
11 33993870
12 408482695
13 5316309607
14 74499953255
15 1118421967520
16 17907571955927
17 304619809031127
18 5486197279305911
19 104289196264058030
20 2086706157642260387
21 43838287730208552691
22 964790364323910060691

[0,0,1,4,19,99,603,4248,34115,307875,3085203,
 33993870,408482695,5316309607,74499953255,
 1118421967520,17907571955927,304619809031127,
 5486197279305911,104289196264058030,
 2086706157642260387,43838287730208552691,
 964790364323910060691]

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Last modified April 16 16:52 EDT 2024. Contains 371749 sequences. (Running on oeis4.)