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”).

A058808 as a simple table

na(n)
11
21
33
442
53750
62720250
719512927000
81631977354072800
91833446251541145780000
1031323109023670061678062500000
119087660958278168844264470405352500000

[1,1,3,42,3750,2720250,19512927000,
 1631977354072800,1833446251541145780000,
 31323109023670061678062500000,
 9087660958278168844264470405352500000]