A051778 - OEIS

A051778 as a triangular array

1

1 0

1 2 1

1 2 0 0

1 2 3 1 1

1 2 3 0 2 0

1 2 3 4 1 0 1

1 2 3 4 0 2 1 0

1 2 3 4 5 1 3 2 1

1 2 3 4 5 0 2 0 0 0

1 2 3 4 5 6 1 3 1 1 1

1 2 3 4 5 6 0 2 4 2 2 0

1 2 3 4 5 6 7 1 3 0 3 0 1

1 2 3 4 5 6 7 0 2 4 1 0 1 0

1 1 1 1 1 1 1 1 1 1 1 1 1 1

0 2 2 2 2 2 2 2 2 2 2 2 2

1 0 3 3 3 3 3 3 3 3 3 3

0 1 0 4 4 4 4 4 4 4 4

1 2 1 0 5 5 5 5 5 5

0 0 2 1 0 6 6 6 6

1 1 3 2 1 0 7 7

0 2 0 3 2 1 0

1 0 1 4 3 2

0 1 2 0 4

1 2 3 1

0 0 0

1 1

0