A251972 - 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

A251972 as a simple table

n	a(n)
1	490000
2	60025000
3	7353062500
4	345888060000
5	16270574342400
6	410018473428480
7	10332465530397696
8	167006381634183168
9	2699368454168838144
10	31245878471405875200
11	361679014193888160000
12	3225176243350261200000

[490000,60025000,7353062500,345888060000, 16270574342400,410018473428480,10332465530397696, 167006381634183168,2699368454168838144, 31245878471405875200,361679014193888160000, 3225176243350261200000]