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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 1
186, 10998, 695541, 44350086, 2830665213, 180689239504, 11534052523389, 736261766040550, 46998354497911525, 3000081595834713716, 191506483600891877185, 12224578599211771061590, 780340796424907303135629 (list; graph; refs; listen; history; text; internal format)
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 * A299830 A265171 A146502

Adjacent sequences: A206512 A206513 A206514 * A206516 A206517 A206518

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 08 2012

STATUS

approved

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Last modified December 8 19:12 EST 2022. Contains 358698 sequences. (Running on oeis4.)