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A156486 Number of nXn arrays of squares of integers, symmetric about main diagonal, with all rows summing to 27. 0
5, 158, 6416, 857040, 374246510, 579965060780, 2053848487196544, 15048641280420910920 (list; graph; refs; listen; history; internal format)
OFFSET

3,1

CROSSREFS

Sequence in context: A156134 A183263 A155208 * A088694 A197310 A085330

Adjacent sequences:  A156483 A156484 A156485 * A156487 A156488 A156489

KEYWORD

nonn

AUTHOR

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

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.