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A279968

Square array read by antidiagonals upwards in which each term is the number of prior elements in the same row, column, diagonal, or antidiagonal whose parity is not the same as the parity of n.

0, 0, 2, 0, 4, 0, 3, 1, 4, 2, 3, 3, 5, 3, 4, 2, 3, 5, 5, 4, 7, 2, 4, 5, 5, 6, 8, 3, 5, 4, 5, 10, 7, 7, 7, 7, 5, 5, 5, 9, 6, 12, 6, 8, 9, 4, 5, 8, 6, 6, 10, 9, 9, 7, 10, 4, 6, 8, 8, 5, 13, 9, 9, 12, 12, 8, 7, 6, 7, 8, 10, 9, 10, 12, 7, 11, 14, 9

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OFFSET

1,3

LINKS

Peter Kagey, Table of n, a(n) for n = 1..5000

EXAMPLE

The first six terms of this array are:

0 2 0

0 4

a(8) = 1 because the parity of 8 is different from the parity of a(7) = 1.

a(3) = 2 because the parity of 3 is different from the parity of a(2) = 0 and a(1) = 0.

PROG