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”).

A276921 as a triangular array

1
10
110
1120
11360
11312240
11313661200
11313744507200
1131375530369050400
1131375540455035280403200
11313755414670455703855603628800

A276921 as a square array

11111111111
0111111111
023333333
06121313131313
0246674757575
0120450530540541
0720369045504670
050403528045570
040320385560
0362880
0
11111111111
0111111111
023333333
06121313131313
0246674757575
0120450530540541
0720369045504670
050403528045570
040320385560
0362880
0