A156393 - OEIS

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A156393

Number of 7X7 arrays of squares of integers, symmetric about the diagonal and under 90 degree rotation, with all rows summing to n.

1, 0, 0, 0, 4, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 14, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 5, 13, 0, 0, 0, 42, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 4, 18, 0, 0, 0, 0, 0, 0, 6, 6, 0, 0, 0

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,5

LINKS

Table of n, a(n) for n=0..99.

EXAMPLE

All solutions for n=4

...0.1.1.0.1.1.0...0.1.1.0.1.1.0...1.0.1.0.1.0.1...1.1.0.0.0.1.1

...1.0.1.0.1.0.1...1.1.0.0.0.1.1...0.1.1.0.1.1.0...1.0.1.0.1.0.1

...1.1.0.0.0.1.1...1.0.1.0.1.0.1...1.1.0.0.0.1.1...0.1.1.0.1.1.0

...0.0.0.4.0.0.0...0.0.0.4.0.0.0...0.0.0.4.0.0.0...0.0.0.4.0.0.0

...1.1.0.0.0.1.1...1.0.1.0.1.0.1...1.1.0.0.0.1.1...0.1.1.0.1.1.0