A302509 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

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”).

Other ways to Give

A302509 as a simple table

n	a(n)
1	1
2	3
3	11
4	28
5	90
6	458
7	4558
8	82857
9	1748514
10	44378638
11	1537387012
12	96444437992
13	9693542232011
14	1237134041433890
15	196120841811367262
16	47516901892945494991
17	19045444458145286230306

[1,3,11,28,90,458,4558,82857,1748514,44378638, 1537387012,96444437992,9693542232011, 1237134041433890,196120841811367262, 47516901892945494991,19045444458145286230306]