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A259622 as a simple table

na(n)
00
11
22
35
417
579
6503
74243
845823
9612809
109903031
11189244327
124203344543
13106963067069
143081230793857
1599460155441599
163566360917197283
17140987300677114811
186104597616658111069
19287835273618906460259

[0,1,2,5,17,79,503,4243,45823,612809,9903031,
 189244327,4203344543,106963067069,3081230793857,
 99460155441599,3566360917197283,
 140987300677114811,6104597616658111069,
 287835273618906460259]