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”).

A266081 as a triangular array

1
11
212
1441
11411
216612
1455541
1112771211
21102629261012
1416232929231641
112135557855352111
213164115146146115643112
144299221364466364

A266081 as a square array

1121121121121
114114114114
24465121016213142
116572623356499
1157292955115221
2412262978146364
11102355146466
111635115364
242164
1131
11
2
1121121121121
114114114114
24465121016213142
116572623356499
1157292955115221
2412262978146364
11102355146466
111635115364
242164
1131
11
2