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A305597 as a simple table

n a(n)
0 1
1 1
2 3
3 59
4 1775
5 71511
6 3735265
7 245211865
8 19803108233
9 1936950231585
10 226553844824131
11 31331105054010115
12 5069552336811706983
13 950370245531340684983
14 204551803567400710962529
15 50129834142929585060592433
16 13883636379729966042468837937
17 4315912911594085891292265635265
18 1496719856496801168910452641821123
19 575834703501821334832940981183532907

[1,1,3,59,1775,71511,3735265,245211865,
 19803108233,1936950231585,226553844824131,
 31331105054010115,5069552336811706983,
 950370245531340684983,204551803567400710962529,
 50129834142929585060592433,
 13883636379729966042468837937,
 4315912911594085891292265635265,
 1496719856496801168910452641821123,
 575834703501821334832940981183532907]

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Last modified June 18 19:58 EDT 2021. Contains 345121 sequences. (Running on oeis4.)