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A333481 as a simple table

na(n)
01
14
248
3652
49344
5138004
62077968
731712412
8488793088
97591462564
10118615816048
111862444310060
1229361743698304
13464472032918196
147368841675386960
15117200150284494652
161868129273410953216
1729834667873867329348
18477283242733227391152
197647021589988643092428

[1,4,48,652,9344,138004,2077968,31712412,
 488793088,7591462564,118615816048,1862444310060,
 29361743698304,464472032918196,7368841675386960,
 117200150284494652,1868129273410953216,
 29834667873867329348,477283242733227391152,
 7647021589988643092428]