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A234863 Number of (n+2)X(2+2) 0..3 arrays with each 3X3 subblock having the sum of its 72 absolute element differences equal to 52, and no adjacent elements equal 1
11714, 56100, 272878, 1375612, 7418922, 41004436, 226557788, 1275430856, 7323656914, 41575518312, 238368201718, 1388296595292, 7966257332788, 46054074430248, 269870537562698, 1556158815336760, 9030637577786558 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A234867

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=2

..0..3..2..0....2..0..3..1....0..2..3..0....3..2..3..0....3..2..3..1

..3..2..0..2....3..1..0..3....1..3..0..1....2..1..0..1....2..3..0..2

..2..0..1..3....1..2..3..1....0..1..2..3....3..0..3..2....1..0..1..0

..3..1..3..0....0..3..1..0....2..0..3..1....1..3..2..0....2..3..0..1

CROSSREFS

Sequence in context: A015630 A237933 A251347 * A250695 A250680 A045307

Adjacent sequences:  A234860 A234861 A234862 * A234864 A234865 A234866

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 01 2014

STATUS

approved

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Last modified October 25 01:39 EDT 2020. Contains 338010 sequences. (Running on oeis4.)