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A002260 as a triangular array

1
12
123
1234
12345
123456
1234567
12345678
123456789
12345678910
1234567891011
123456789101112
12345678910111213
1234567891011121314

A002260 as a square array

11111111111111
2222222222222
333333333333
44444444444
5555555555
666666666
77777777
8888888
999999
1010101010
11111111
121212
1313
14

A002260 as an upper right triangle

11111111111111
2222222222222
333333333333
44444444444
5555555555
666666666
77777777
8888888
999999
1010101010
11111111
121212
1313
14

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Last modified April 29 03:15 EDT 2024. Contains 372097 sequences. (Running on oeis4.)