A159223 Number of n X n arrays of squares of integers with every 3X3 subblock summing to 21

7182, 81970, 467006, 1871442, 9915518, 40057258, 143026182, 684920266, 2780241662, 10567815570

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