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A156503 Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 40. 0
2, 6, 60, 2914, 1216320, 1982323016, 10802428568204, 144294430454318540 (list; graph; refs; listen; history; text; internal format)
OFFSET
2,1
LINKS
CROSSREFS
Sequence in context: A084971 A224883 A001577 * A077175 A139771 A129665
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 09 2009
STATUS
approved

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Last modified April 13 21:47 EDT 2024. Contains 371645 sequences. (Running on oeis4.)