login

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

A193738 as a triangular array

1
11
122
1233
12344
123455
1234566
12345677
123456788
1234567899
1234567891010
123456789101111
12345678910111212
1234

A193738 as a square array

11111111111111
1222222222222
233333333333
34444444444
455555555
56666666
6777777
788888
89999
9101010
101111
1112
12
11111111111111
1222222222222
233333333333
34444444444
455555555
56666666
6777777
788888
89999
9101010
101111
1112
12