A135870 - 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

A135870 as a simple table

n	a(n)
0	1
1	2
2	13
3	246
4	13554
5	2210436
6	1076561037
7	1570714992558
8	6871883750090694
9	90179738434097457084
10	3550105797469080332658354
11	419263945026939228053105930844
12	148543119421079567735277052592081220

[1,2,13,246,13554,2210436,1076561037, 1570714992558,6871883750090694, 90179738434097457084,3550105797469080332658354, 419263945026939228053105930844, 148543119421079567735277052592081220]