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”).

A127253 as a triangular array

1
01
-101
0001
00001
000001
0000001
00000001
000000-101
0000000001
00000000001
000000000001
0000000000001

A127253 as a square array

10-10000000000
100000000000
10000000000
1000000000
100000000
10000000
10-10000
100000
10000
1000
100
10
1
10-10000000000
100000000000
10000000000
1000000000
100000000
10000000
10-10000
100000
10000
1000
100
10
1