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A156518 Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 61. 0
2, 12, 326, 16298, 5919644, 9055603332, 108964188487952, 6758216414353306068 (list; graph; refs; listen; history; text; internal format)
OFFSET
2,1
LINKS
CROSSREFS
Sequence in context: A094047 A300045 A091472 * A012727 A296622 A325756
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 09 2009
STATUS
approved

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Last modified June 1 11:52 EDT 2023. Contains 363068 sequences. (Running on oeis4.)