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”).

A147478 as a simple table

na(n)
11
21
31
41
51
61
71
81
94
107
1114
1221
1338
1489
15317
16871

[1,1,1,1,1,1,1,1,4,7,14,21,38,89,317,871]