login

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

A197090 as a triangular array

1
11
121
1551
11025101
1269696261
165422631422651
116117805101510117801611
1403753737952718673795275374031
11006319112895649396909396902895643191110061
12511135283

A197090 as a square array

11111111111
12510266516140310062511
1525964221780753731911135283
11096631510137952289564
126422510171867939690
165178037952939690
11617537289564
140331911
11006
1
11111111111
12510266516140310062511
1525964221780753731911135283
11096631510137952289564
126422510171867939690
165178037952939690
11617537289564
140331911
11006
1