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Search: id:A156493
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A156493 Number of nXn arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 32. +0
1
1, 0, 2, 6, 72, 804, 78655, 960648, 232585695, 21668424870 (list; graph; listen)
OFFSET

2,3

CROSSREFS

Sequence in context: A103527 A152885 A052613 this_sequence A117515 A085865 A061296

Adjacent sequences: A156490 A156491 A156492 this_sequence A156494 A156495 A156496

KEYWORD

nonn

AUTHOR

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

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.


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