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”).

A099173 as a triangular array

0
01
012
0123
01244
012585
012612166
01271629327
0128204470648
012924611201691289
01210288018232840825610
012113210125654789698551211

A099173 as a square array

000000000000
11111111111
2222222222
34567891011
48121620242832
51629446180101
63270120182256
764169328547
8128408896
9256985
10512
11
000000000000
11111111111
2222222222
34567891011
48121620242832
51629446180101
63270120182256
764169328547
8128408896
9256985
10512
11