A270291 - 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

A270291 as a simple table

n	a(n)
0	1
1	5
2	37
3	177
4	785
5	3345
6	14113
7	57697
8	231809
9	932161
10	3730689
11	14942145
12	59816609
13	239315361
14	957265025
15	3829309985

[1,5,37,177,785,3345,14113,57697,231809,932161, 3730689,14942145,59816609,239315361,957265025, 3829309985]