A210396 - OEIS

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A210396

Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having one or three distinct values, and new values 0..3 introduced in row major order

7, 1316, 1596154, 11066406572, 437975212393770, 98959148496365005996, 127648944977287507883659858, 940014634186299364055616416384316

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Diagonal of A210404

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=4

..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..1..0..0

..1..2..3..2..3....1..2..3..2..3....1..2..1..3..1....2..1..3..0..0

..0..2..0..3..0....0..2..1..1..1....3..2..0..0..3....0..0..1..1..2

..1..2..3..2..3....2..1..3..2..3....1..1..0..0..1....0..0..2..3..1

..1..3..1..3..0....3..1..0..2..0....0..2..0..0..3....3..2..3..1..2

CROSSREFS

Sequence in context: A190266 A119181 A152518 * A289482 A214010 A145451

Adjacent sequences: A210393 A210394 A210395 * A210397 A210398 A210399

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 21 2012

STATUS

approved