login

A026821 as a triangular array

1
01
101
1001
11001
210001
2110001
31100001
321100001
5211000001
53111000001
732110000001
842111000000

A026821 as a square array

1011122335578
100111122334
10001111122
1000011111
100000111
10000001
1000000
100000
10000
1000
100
10
1011122335578
100111122334
10001111122
1000011111
100000111
10000001
1000000
100000
10000
1000
100
10