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A156511 Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 49. 0
1, 2, 2, 82, 210, 24604, 157700, 153363108, 4197081428, 19984585910224 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
CROSSREFS
Sequence in context: A303569 A156523 A191779 * A166996 A133295 A055470
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 09 2009
STATUS
approved

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Last modified July 20 22:04 EDT 2024. Contains 374461 sequences. (Running on oeis4.)