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A156423 Number of 17 X 17 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n. 0
1, 32400, 221921280, 131023800192, 38710991748930, 1839487795001024, 71091010320744928, 681286019507189376 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
CROSSREFS
Sequence in context: A190471 A236994 A156421 * A236656 A031639 A233680
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 09 2009
STATUS
approved

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Last modified March 28 12:26 EDT 2024. Contains 371254 sequences. (Running on oeis4.)