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”).

A117157 as a simple table

na(n)
11
21
31
42
54
611
749
8548
926872
1014725925
11395715057217
125827270253948278214
132305938581960065033611659323852
1413437327306087560724405450621249967248150551970959

[1,1,1,2,4,11,49,548,26872,14725925,395715057217,
 5827270253948278214,
 2305938581960065033611659323852,
 13437327306087560724405450621249967248150551970959\
 ]