login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A169618 as a triangular array

1
22
333
6622
55555
666666
711812263
12204412444
151566666615
10101010101010101010
1111111111111111111111
181866181866181866
131118820156

A169618 as a square array

1236567121510111813
2365611201510111811
32568461011618
2561246101168
56212610111820
664610111815
346101166
4610116
15101118
101118
116
6
1236567121510111813
2365611201510111811
32568461011618
2561246101168
56212610111820
664610111815
346101166
4610116
15101118
101118
116
6