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A156451 Number of nXn arrays of squares of integers, symmetric about main diagonal, with all rows summing to 10. 0
2, 6, 60, 972, 56610, 4465916, 541808498, 101930271184, 39015704748255, 40748977102642818 (list; graph; refs; listen; history; internal format)
OFFSET

2,1

CROSSREFS

Sequence in context: A086332 A180402 A089039 * A152617 A156472 A108640

Adjacent sequences:  A156448 A156449 A156450 * A156452 A156453 A156454

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Feb 09 2009

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Last modified February 17 06:27 EST 2012. Contains 205998 sequences.