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A156414 Number of 13 X 13 arrays of squares of integers, symmetric about the diagonal and under 90-degree rotation, with all rows summing to n. 0
1, 0, 0, 0, 820, 0, 0, 0, 3360, 0, 0, 0, 36432, 13751, 0, 0, 31360, 0, 0, 0, 195030, 56610, 0, 0, 267840, 0, 0, 0, 311160, 591360, 0, 0, 1153590, 0, 0, 0, 1588985, 1579898, 0, 0, 3060152, 0, 0, 0, 6895464, 5338980, 0, 0, 7741574, 0, 0, 0, 12164249, 10043220, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Table of n, a(n) for n=0..55.

CROSSREFS

Sequence in context: A064195 A229409 A015308 * A043587 A043791 A043805

Adjacent sequences:  A156411 A156412 A156413 * A156415 A156416 A156417

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 09 2009

STATUS

approved

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Last modified August 11 19:26 EDT 2022. Contains 356066 sequences. (Running on oeis4.)