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A156514 Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 51. 0
5, 116, 452, 60568, 662388, 382580208, 13757627936, 22555562198752 (list; graph; refs; listen; history; text; internal format)
OFFSET
3,1
LINKS
CROSSREFS
Sequence in context: A245105 A080988 A230338 * A319392 A268606 A006221
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 09 2009
STATUS
approved

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Last modified July 25 15:49 EDT 2024. Contains 374612 sequences. (Running on oeis4.)