login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A030446 as a simple table

na(n)
11
21
36
435
5290
62680
726379
8267598
92758016
1028749456
11302120154
123196299285
1334007337629

[1,1,6,35,290,2680,26379,267598,2758016,28749456,
 302120154,3196299285,34007337629]