A234178 Number of (n+1)X(2+1) 0..5 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1.

388, 3908, 39098, 392664, 3949718, 39781838, 401094098, 4047234624, 40864744240, 412820019378, 4172049278156, 42177344818466, 426502759233778, 4313746963897986, 43637479774212176, 441491561412113340

Offset

1,1

Comments

Column 2 of A234184

Links

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

Formula

Empirical: a(n) = 24*a(n-1) -182*a(n-2) +349*a(n-3) +938*a(n-4) -2021*a(n-5) -1914*a(n-6) +2375*a(n-7) +1747*a(n-8) -219*a(n-9) -140*a(n-10) +20*a(n-11)

Example

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

Crossrefs

Sequence in context: A259695 A223193 A284147 * A223390 A393194 A200970

Adjacent sequences: A234175 A234176 A234177 * A234179 A234180 A234181

Keyword

nonn

Author

R. H. Hardin, Dec 20 2013

Status

approved