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”).

A220794 as a triangular array

1
11
261
419231
776142941
12267175312243801
2110741548632507950014941
3740691329776025365637157458159391
6515916111504110731537206359199507244568257233981
11462161

A220794 as a square array

1124712213765114
161976267107440691591662161
1231421753154861329771115041
19412243250760253610731537
1380950056371520635919
11494745819507244
15939568257
123398
1
1124712213765114
161976267107440691591662161
1231421753154861329771115041
19412243250760253610731537
1380950056371520635919
11494745819507244
15939568257
123398
1