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A156387 Number of 5X5 arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to n. 0
1, 2, 0, 0, 5, 3, 0, 0, 2, 4, 0, 0, 0, 4, 0, 0, 7, 4, 0, 0, 7, 0, 0, 0, 0, 8, 0, 0, 0, 10, 0, 0, 6, 0, 0, 0, 15, 6, 0, 0, 6, 6, 0, 0, 0, 11, 0, 0, 0, 6, 0, 0, 10, 14, 0, 0, 0, 0, 0, 0, 0, 10, 0, 0, 7, 12, 0, 0, 28, 0, 0, 0, 10, 6, 0, 0, 0, 6, 0, 0, 17, 12, 0, 0, 0, 16, 0, 0, 0, 14, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

EXAMPLE

All solutions for n=4

...0.0.0.4.0...0.4.0.0.0...1.0.1.1.1...1.1.0.1.1...1.1.1.0.1

...4.0.0.0.0...0.0.0.0.4...1.1.1.1.0...1.1.0.1.1...0.1.1.1.1

...0.0.4.0.0...0.0.4.0.0...1.1.0.1.1...0.0.4.0.0...1.1.0.1.1

...0.0.0.0.4...4.0.0.0.0...0.1.1.1.1...1.1.0.1.1...1.1.1.1.0

...0.4.0.0.0...0.0.0.4.0...1.1.1.0.1...1.1.0.1.1...1.0.1.1.1

CROSSREFS

Sequence in context: A290321 A145430 A143160 * A324040 A223705 A285192

Adjacent sequences:  A156384 A156385 A156386 * A156388 A156389 A156390

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 09 2009

STATUS

approved

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Last modified December 4 09:23 EST 2020. Contains 338921 sequences. (Running on oeis4.)