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”).

A239465 as a simple table

na(n)
21
34
414
52
615
719
826
9118
10128
111388
1218588
13111143
1411721111115

[1,4,14,2,15,19,26,118,128,1388,18588,111143,
 11721111115]