A146090 Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 4 and every element equal to at least one neighbor.

1, 93, 538, 1532, 3630, 7540, 14138, 24480, 39802, 61520, 91230, 130708, 181910, 246972, 328210, 428120, 549378, 694840, 867542, 1070700, 1307710, 1582148, 1897770, 2258512, 2668490, 3132000, 3653518, 4237700, 4889382, 5613580

Offset

3,2

Links

Table of n, a(n) for n=3..32.

Crossrefs

Sequence in context: A045235 A116240 A193248 * A160174 A238693 A160250

Adjacent sequences: A146087 A146088 A146089 * A146091 A146092 A146093

Keyword

nonn

Author

R. H. Hardin Apr 14 2009

Status

approved