A210126 - OEIS

A210126

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

8, 2609, 7873809, 198219480450, 41562568796591219, 72599208484317720843697, 1056388250136974018200396639877, 128049790734830831106262989769387911331

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

OFFSET

1,1

COMMENTS

Diagonal of A210134

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

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

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

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

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

CROSSREFS

Sequence in context: A325062 A247733 A343696 * A259440 A172957 A233169

Adjacent sequences: A210123 A210124 A210125 * A210127 A210128 A210129

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 17 2012

STATUS

approved