login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

A287431 as a simple table

na(n)
17
221
345
4129
5373
61177
73741
812065
938949
10125993
11407597
121318961
134268085
1413811769
1544695613
16144638017
17468058181
181514668105
194901568589
2015861809233
2151329892437
22166107021401
23537533612125
241739495309409
255629125066853
2618216231370857
2758948963008621

[7,21,45,129,373,1177,3741,12065,38949,125993,
 407597,1318961,4268085,13811769,44695613,
 144638017,468058181,1514668105,4901568589,
 15861809233,51329892437,166107021401,537533612125,
 1739495309409,5629125066853,18216231370857,
 58948963008621]