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A234862 Number of (n+2)X(1+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
2216, 11714, 61954, 326786, 1791552, 9897540, 54119058, 297874488, 1655842138, 9105854856, 50163046756, 278949824936, 1536234456774, 8465287947954, 47047724965648, 259290094145420, 1429038515851044, 7936986520592132 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A234867

LINKS

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

R. H. Hardin, Empirical recurrence of order 70

FORMULA

Empirical recurrence of order 70 (see link above)

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A138079 A183831 A234867 * A245949 A223159 A223158

Adjacent sequences:  A234859 A234860 A234861 * A234863 A234864 A234865

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 01 2014

STATUS

approved

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Last modified August 10 07:57 EDT 2022. Contains 356036 sequences. (Running on oeis4.)