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”).

A145250 as a simple table

na(n)
11
26
3966
4153996
5661773786
62815356109536
7322956657504465996
836676462296254099505756

[1,6,966,153996,661773786,2815356109536,
 322956657504465996,36676462296254099505756]