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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
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified April 20 17:54 EDT 2019. Contains 322310 sequences. (Running on oeis4.)