A218220 - OEIS

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A218220 as a triangular array

1

1 1

1 1 -1

1 1 0 -1

1 1 1 -1 1

1 1 2 1 -1 1

1 1 3 5 1 0 -1

1 1 4 11 13 1 1 -1

1 1 5 19 41 34 1 1 1

1 1 6 29 91 153 89 1 0 1

1 1 7 41 169 436 571 233 1 -1 -1

1 1 8 55 281 985 2089 2131 610 1 -1 -1

1 1 9 71 433 1926 5741 10009 7953 1597 1 0 1

1 1 10 89 631 3409 13201 33461 47956 29681

A218220 as a square array

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

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

-1 0 1 2 3 4 5 6 7 8 9 10

-1 -1 1 5 11 19 29 41 55 71 89

1 -1 1 13 41 91 169 281 433 631

1 0 1 34 153 436 985 1926 3409

-1 1 1 89 571 2089 5741 13201

-1 1 1 233 2131 10009 33461

1 0 1 610 7953 47956

1 -1 1 1597 29681

-1 -1 1

-1 0

1

A218220 as an upper right triangle