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A112836 as a simple table

na(n)
01
12
25
313
452
5261
61666
714400
8159250
92308545
1043718544
111079620569
1234863330980
131466458546176
1480646187346132
155787269582487581
16541901038236234048
1766279540183479379277
1810578427028263503488000

[1,2,5,13,52,261,1666,14400,159250,2308545,
 43718544,1079620569,34863330980,1466458546176,
 80646187346132,5787269582487581,
 541901038236234048,66279540183479379277,
 10578427028263503488000]