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”).

A147767 as a triangular array

1
01
201
2201
52201
652201
65220113
6522011613
652201301613
65220140301613
652201403016136
52201

A147767 as a square array

102256666665
10225555552
1022222222
102222220
10000001
111111
1316304040
13163030
131616
1313
6
102256666665
10225555552
1022222222
102222220
10000001
111111
1316304040
13163030
131616
1313
6