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A156488
Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 28.
0
6, 0, 78, 163, 58704, 590400, 202480300, 9256081380, 4014312232560
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OFFSET
4,1
LINKS
Table of n, a(n) for n=4..12.
CROSSREFS
Sequence in context:
A191688
A051767
A199044
*
A057399
A245086
A365909
Adjacent sequences:
A156485
A156486
A156487
*
A156489
A156490
A156491
KEYWORD
nonn
AUTHOR
R. H. Hardin
Feb 09 2009
STATUS
approved
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Last modified April 23 10:29 EDT 2024. Contains 371905 sequences. (Running on oeis4.)