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”).

A166961 as a triangular array

1
11
191
159421
13619251541
121751640289375071
1130612656053650506750015871
178379412774612611845559285044224248521
147028962935117398536866365184855683379222652742146761

A166961 as a square array

111111111
195936121751306178379470289
14292516402265605412774662935117
1154893736505012611845398536866
1507675005592850365184855
1158744224268337922
148522652742
114676
1
111111111
195936121751306178379470289
14292516402265605412774662935117
1154893736505012611845398536866
1507675005592850365184855
1158744224268337922
148522652742
114676
1