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