login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

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