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A146199 Number of n X n arrays of squares of integers with every (n-2)X(n-2) subblock summing to 6 and every element equal to at least one neighbor. 1
0, 98, 34778, 290306, 1182610, 3573766, 9017466, 20075266, 40694834, 76649830, 136042186, 229866786, 372638546, 583081894, 884882650, 1307502306, 1887054706, 2667245126 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,2

LINKS

Table of n, a(n) for n=4..21.

CROSSREFS

Sequence in context: A181553 A251914 A277658 * A159381 A295191 A295184

Adjacent sequences:  A146196 A146197 A146198 * A146200 A146201 A146202

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 14 2009

STATUS

approved

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Last modified September 23 11:53 EDT 2020. Contains 337310 sequences. (Running on oeis4.)