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A156486 Number of n X n 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; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..10.

CROSSREFS

Sequence in context: A183263 A155208 A321529 * A208170 A088694 A208583

Adjacent sequences:  A156483 A156484 A156485 * A156487 A156488 A156489

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 09 2009

STATUS

approved

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Last modified November 15 01:07 EST 2019. Contains 329142 sequences. (Running on oeis4.)