A230618 - 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

A230618 as a simple table

n	a(n)
1	0
2	0
3	0
4	44916
5	4899200
6	570014364
7	62312057642
8	6859445695566
9	753992937156292
10	82884961506928674
11	9111820198577944474
12	1001675666375464430008
13	110115929289424892845128
14	12105240130837251432416920

[0,0,0,44916,4899200,570014364,62312057642, 6859445695566,753992937156292,82884961506928674, 9111820198577944474,1001675666375464430008, 110115929289424892845128, 12105240130837251432416920]