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”).

A377000 as a triangular array

1
21
331
4541
57861
69121381
711162121121
81320293634161
9152437526355241
10172845689410889321
1119325384126169189144481
12213661100158232305324233641

A377000 as a square array

123456789101112
13579111315171921
14812162024283236
1613212937455361
182136526884100
112346394126158
11655108169232
12489189305
132144324
148233
164
1
123456789101112
13579111315171921
14812162024283236
1613212937455361
182136526884100
112346394126158
11655108169232
12489189305
132144324
148233
164
1