A114954 - 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

A114954 as a simple table

n	a(n)
0	1
1	1
2	2
3	4
4	11
5	45
6	339
7	6544
8	535619
9	392527477
10	7777266564708
11	21689055127418446258
12	101009204076980364695686091211

[1,1,2,4,11,45,339,6544,535619,392527477, 7777266564708,21689055127418446258, 101009204076980364695686091211]