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A159215 Number of n X n arrays of squares of integers with every 3X3 subblock summing to 15 0
3480, 37772, 213728, 864276, 4577552, 19067804, 73644648, 370791068, 1692340016, 7824640020 (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: A109484 A232889 A328817 * A176380 A156773 A174753

Adjacent sequences:  A159212 A159213 A159214 * A159216 A159217 A159218

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 06 2009

STATUS

approved

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Last modified June 25 05:51 EDT 2021. Contains 345452 sequences. (Running on oeis4.)