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Search: id:A156499
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A156499 Number of nXn arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 36. +0
1
1, 0, 0, 7, 15, 150, 1830, 136182, 3730237, 747469740, 63910429200 (list; graph; listen)
OFFSET

1,4

CROSSREFS

Sequence in context: A032004 A032018 A068366 this_sequence A137881 A042725 A041096

Adjacent sequences: A156496 A156497 A156498 this_sequence A156500 A156501 A156502

KEYWORD

nonn

AUTHOR

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

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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