A080048 - 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

A080048 as a simple table

n	a(n)
2	1
3	7
4	34
5	182
6	1107
7	7773
8	62212
9	559948
10	5599525
11	61594835
12	739138086
13	9608795202
14	134523132919
15	2017846993897
16	32285551902472
17	548854382342168
18	9879378882159177
19	187708198761024543
20	3754163975220491050

[1,7,34,182,1107,7773,62212,559948,5599525, 61594835,739138086,9608795202,134523132919, 2017846993897,32285551902472,548854382342168, 9879378882159177,187708198761024543, 3754163975220491050]