A110509 - OEIS

A110509 as a triangular array

1

0 1

0 -2 1

0 0 -4 1

0 0 4 -6 1

0 0 0 12 -8 1

0 0 0 -8 24 -10 1

0 0 0 0 -32 40 -12 1

0 0 0 0 16 -80 60 -14 1

0 0 0 0 0 80 -160 84 -16 1

0 0 0 0 0 -32 240 -280 112 -18 1

0 0 0 0 0 0 -192 560 -448 144 -20 1

0 0 0 0 0 0 64 -672 1120 -672 180 -22 1

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

1 -2 0 0 0 0 0 0 0 0 0 0

1 -4 4 0 0 0 0 0 0 0 0

1 -6 12 -8 0 0 0 0 0 0

1 -8 24 -32 16 0 0 0 0

1 -10 40 -80 80 -32 0 0

1 -12 60 -160 240 -192 64

1 -14 84 -280 560 -672

1 -16 112 -448 1120

1 -18 144 -672

1 -20 180

1 -22

1