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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
OFFSET
0,5
CROSSREFS
Sequence in context: A064195 A229409 A015308 * A043587 A043791 A043805
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 09 2009
STATUS
approved