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A159223 Number of n X n arrays of squares of integers with every 3X3 subblock summing to 21 0
7182, 81970, 467006, 1871442, 9915518, 40057258, 143026182, 684920266, 2780241662, 10567815570 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..12.

CROSSREFS

Sequence in context: A279529 A237394 A028541 * A143193 A064979 A348807

Adjacent sequences:  A159220 A159221 A159222 * A159224 A159225 A159226

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 06 2009

STATUS

approved

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Last modified May 21 09:30 EDT 2022. Contains 353908 sequences. (Running on oeis4.)