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”).

A340311 as a simple table

na(n)
11
22
34
46
510
617
732
861
9117
10218
11424
12795
131533
142922
155590
1610720
1720592
1839564
1976082
20146591
21282059
22544377
231049753
242026788
253912391
267559884

[1,2,4,6,10,17,32,61,117,218,424,795,1533,2922,
 5590,10720,20592,39564,76082,146591,282059,544377,
 1049753,2026788,3912391,7559884]