A159207 Number of n X n arrays of squares of integers with every 3X3 subblock summing to 7.

540, 4128, 19028, 64440, 278516, 945816, 2788452, 10699008, 34672388, 103376592, 390361412, 1299118848, 4097433060

Offset

3,1

Links

Table of n, a(n) for n=3..15.

Crossrefs

Sequence in context: A218414 A328133 A146123 * A101705 A034620 A146196

Adjacent sequences: A159204 A159205 A159206 * A159208 A159209 A159210

Keyword

nonn

Author

R. H. Hardin, Apr 06 2009

Status

approved