A051127 - OEIS

A051127 as a triangular array

0

0 1

0 0 1

0 1 2 1

0 0 0 2 1

0 1 1 3 2 1

0 0 2 0 3 2 1

0 1 0 1 4 3 2 1

0 0 1 2 0 4 3 2 1

0 1 2 3 1 5 4 3 2 1

0 0 0 0 2 0 5 4 3 2 1

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

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

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

0 0 0 0 0 0 0 0 0 0 0 0 0 0

1 0 1 0 1 0 1 0 1 0 1 0 1

1 2 0 1 2 0 1 2 0 1 2 0

1 2 3 0 1 2 3 0 1 2 3

1 2 3 4 0 1 2 3 4 0

1 2 3 4 5 0 1 2 3

1 2 3 4 5 6 0 1

1 2 3 4 5 6 7

1 2 3 4 5 6

1 2 3 4 5

1 2 3 4

1 2 3

1 2

1