A222912 - OEIS

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A222912

Number of 7Xn 0..3 arrays with no more than floor(7Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order

715, 15919, 759891, 105327353, 4854855483, 997770825049, 51666240687220, 11720702848290810, 667162032011395790, 166939045536469920335

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

OFFSET

1,1

COMMENTS

Row 7 of A222906

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=3

..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0

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

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

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

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

CROSSREFS

Sequence in context: A029565 A154042 A027809 * A266107 A030537 A140919

Adjacent sequences: A222909 A222910 A222911 * A222913 A222914 A222915

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 09 2013

STATUS

approved