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”).

A052154 as a triangular array

1
10
110
1100
11200
112100
1125000
11256000
1125146000
112514264000
11251442441000
11251442100690000

A052154 as a square array

111111111111
01111111111
0022222222
001555555
000614141414
0006264242
000444100
000169
0000
000
00
0
111111111111
01111111111
0022222222
001555555
000614141414
0006264242
000444100
000169
0000
000
00
0