login

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

A280519 as a triangular array

1
11
1031
2154161
122311115105101
2025462748623466215151
1351857641142942102672818372385211
6255560531733108376631115764635872704917318630281

A280519 as a square array

111021512231202546213518576416255560531733
13411115748621429421010837663111
16105346626728157646358
1102158372727049
11538517318
121630
128
1
111021512231202546213518576416255560531733
13411115748621429421010837663111
16105346626728157646358
1102158372727049
11538517318
121630
128
1