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A053504 as a simple table

na(n)
01
11
22
36
424
596
6576
73312
826496
9198144
101691136
1114973696
12193370112
132034809856
1425087186944
15313539434496
164421478721536
1758307347556352
18915011420737536
1913553664911437824
20240637745416421376
213965015057937924096

[1,1,2,6,24,96,576,3312,26496,198144,1691136,
 14973696,193370112,2034809856,25087186944,
 313539434496,4421478721536,58307347556352,
 915011420737536,13553664911437824,
 240637745416421376,3965015057937924096]