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”).

A117260 as a triangular array

1
11
221
8841
64643281
10241024512128161
3276832768163844096512321
209715220971521048576262144327682048641
26843545626843545613421772833554432419430426214481921281

A117260 as a square array

1128641024327682097152268435456
128641024327682097152268435456
1432512163841048576134217728
18128409626214433554432
116512327684194304
1322048262144
1648192
1128
1
1128641024327682097152268435456
128641024327682097152268435456
1432512163841048576134217728
18128409626214433554432
116512327684194304
1322048262144
1648192
1128
1