A049801 - OEIS

A049801 as a triangular array

0

0 0

0 0 0

0 0 0 0

0 0 0 1 1

0 0 0 0 0 0

0 0 0 1 1 1 0

0 0 0 0 0 0 1 1

0 0 0 1 1 1 2 2 2

0 0 0 0 0 0 0 0 0 0

0 0 0 1 1 1 1 1 1 1 1

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

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

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

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

0 0 0 0 0 0 0 0 0 0 0

0 1 0 1 0 1 0 1 0 1

1 0 1 0 1 0 1 0 1

0 1 0 1 0 1 0 1

0 1 2 0 1 2 0

1 2 0 1 2 0

2 0 1 2 0

0 1 2 3

1 2 3

2 3

0