A172250 - OEIS

The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.

The OEIS is supported by the many generous donors to the OEIS Foundation.

A172250 as a triangular array

1

0 1

0 1 0

0 0 2 -1

0 0 1 1 -1

0 0 0 3 -2 0

0 0 0 1 3 -4 1

0 0 0 0 4 -2 -2 1

0 0 0 0 1 6 -9 3 0

0 0 0 0 0 5 0 -9 6 -1

0 0 0 0 0 1 10 -15 3 3 -1

0 0 0 0 0 0 6 5 -24 18 -4 0

0 0 0 0 0 0 1 15 -20 -6 18 -8 1

A172250 as a square array

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

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

0 2 1 0 0 0 0 0 0 0 0

-1 1 3 1 0 0 0 0 0 0

-1 -2 3 4 1 0 0 0 0

0 -4 -2 6 5 1 0 0

1 -2 -9 0 10 6 1

1 3 -9 -15 5 15

0 6 3 -24 -20

-1 3 18 -6

-1 -4 18

0 -8

1

A172250 as an upper right triangle