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Search: id:A156490
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A156490 Number of nXn arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 29. +0
1
2, 0, 86, 38, 6888, 50136, 13485160, 436323840, 284466859232, 19181871809320 (list; graph; listen)
OFFSET

2,1

CROSSREFS

Sequence in context: A012451 A012447 A136558 this_sequence A136559 A009740 A132860

Adjacent sequences: A156487 A156488 A156489 this_sequence A156491 A156492 A156493

KEYWORD

nonn

AUTHOR

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

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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.


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