login

A304520 as a simple table

na(n)
17
228
3158
41087
58420
669034
7586400
85097725
945088364
10404211372
113663020374
1233489909119
13308457775318
142858876653517
1526639629964435
16249393774431034
172344318827962046
1822116397163892861
19209317713089716899
201986761935587919881
2118906449884370307192

[7,28,158,1087,8420,69034,586400,5097725,45088364,
 404211372,3663020374,33489909119,308457775318,
 2858876653517,26639629964435,249393774431034,
 2344318827962046,22116397163892861,
 209317713089716899,1986761935587919881,
 18906449884370307192]