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”).

A145964 as a simple table

na(n)
11
21
31
41
525
6173
71794
820685
9319727
106676539
11232552310
1211372993795

[1,1,1,1,25,173,1794,20685,319727,6676539,
 232552310,11372993795]