A234125 Number of (n+1)X(2+1) 0..6 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1

469, 4757, 47933, 484731, 4909103, 49779251, 505273311, 5132833317, 52176901353, 530689037697, 5400110298073, 54970941475239, 559763882549955, 5701582841549151, 58087981854053195, 591918422269666865

Offset

1,1

Comments

Column 2 of A234131

Links

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

Formula

Empirical: a(n) = 26*a(n-1) -218*a(n-2) +474*a(n-3) +1603*a(n-4) -5034*a(n-5) -4660*a(n-6) +14440*a(n-7) +7897*a(n-8) -13910*a(n-9) -6694*a(n-10) +2654*a(n-11) +581*a(n-12) -250*a(n-13) +20*a(n-14)

Example

Some solutions for n=3
..3..3..2....1..0..1....4..4..4....3..3..3....4..4..4....3..2..1....1..1..2
..2..2..3....1..0..1....5..5..4....4..3..2....3..4..3....3..2..2....1..2..2
..2..2..2....1..1..1....5..4..4....4..3..3....4..4..4....2..2..2....2..2..1
..3..2..3....1..1..0....4..4..3....4..3..4....4..3..4....1..1..1....2..1..1

Crossrefs

Sequence in context: A045305 A349275 A250238 * A259423 A188138 A112297

Adjacent sequences: A234122 A234123 A234124 * A234126 A234127 A234128

Keyword

nonn

Author

R. H. Hardin, Dec 19 2013

Status

approved