A206515 Number of (n+1)X3 0..3 arrays with every 2X3 or 3X2 subblock having no more than four equal edges, and new values 0..3 introduced in row major order

186, 10998, 695541, 44350086, 2830665213, 180689239504, 11534052523389, 736261766040550, 46998354497911525, 3000081595834713716, 191506483600891877185, 12224578599211771061590, 780340796424907303135629

Offset

1,1

Comments

Column 2 of A206521

Links

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

Formula

Empirical: a(n) = 66*a(n-1) -116*a(n-2) -1310*a(n-3) -7016*a(n-4) -9076*a(n-5) -9408*a(n-6) -4662*a(n-7) -4635*a(n-8) -378*a(n-9) -648*a(n-10)

Example

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

Crossrefs

Sequence in context: A230898 A241942 A161619 * A366488 A299830 A265171

Adjacent sequences: A206512 A206513 A206514 * A206516 A206517 A206518

Keyword

nonn

Author

R. H. Hardin Feb 08 2012

Status

approved