A181218 - 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

A181218 as a simple table

n	a(n)
1	2
2	16
3	230
4	10732
5	1495392
6	507962194
7	493466099722
8	1328921689649459
9	9633695407844528952
10	192630734231370260714836
11	10572973250296811381776668634

[2,16,230,10732,1495392,507962194,493466099722, 1328921689649459,9633695407844528952, 192630734231370260714836, 10572973250296811381776668634]