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Search: id:A156498
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A156498 Number of nXn arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 36. +0
1
1, 2, 4, 51, 275, 16008, 175374, 67060718, 1866384501, 2036398653264 (list; graph; listen)
OFFSET

1,2

CROSSREFS

Sequence in context: A143968 A097424 A032019 this_sequence A085325 A082661 A115587

Adjacent sequences: A156495 A156496 A156497 this_sequence A156499 A156500 A156501

KEYWORD

nonn

AUTHOR

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

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.


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