login

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”).

A105923 as a simple table

na(n)
01
10
20
30
40
50
61536
721120
8238700
91638016
10920985
1137368320
12116574784

[1,0,0,0,0,0,1536,21120,238700,1638016,920985,
 37368320,116574784]