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”).

A176724 as a triangular array

1
01
011
0011
00011
001111
0001111
00001111
000012111
0001012111
00001012111
000002122111
0000012122111
00000012122111

A176724 as a square array

10000000000000
1100000000000
110100000000
11110010000
1111101000
111210210
11121121
1112212
111221
11122
1112
111
11
1
10000000000000
1100000000000
110100000000
11110010000
1111101000
111210210
11121121
1112212
111221
11122
1112
111
11
1