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

2216, 11714, 61954, 326786, 1791552, 9897540, 54119058, 297874488, 1655842138, 9105854856, 50163046756, 278949824936, 1536234456774, 8465287947954, 47047724965648, 259290094145420, 1429038515851044, 7936986520592132

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