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A156488 Number of nXn arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 28. +0
1
6, 0, 78, 163, 58704, 590400, 202480300, 9256081380, 4014312232560 (list; graph; listen)
OFFSET

4,1

CROSSREFS

Sequence in context: A051768 A013323 A051767 this_sequence A057399 A145223 A072129

Adjacent sequences: A156485 A156486 A156487 this_sequence A156489 A156490 A156491

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Feb 09 2009

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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