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A215529 as a simple table

na(n)
01
11
24
331
4377
56415
6142252
73919208
8129681162
95025119715
10223662035160
1111260717242863
12633424125262667
1339405127536106444
142688050940578533440
15199621706483099855304
1616038639938585081005722
171386688821351774846453155
18128409360760837836935472512

[1,1,4,31,377,6415,142252,3919208,129681162,
 5025119715,223662035160,11260717242863,
 633424125262667,39405127536106444,
 2688050940578533440,199621706483099855304,
 16038639938585081005722,1386688821351774846453155,
 128409360760837836935472512]