A275042 - OEIS

A275042

Number of 7Xn 0..2 arrays with no element equal to any value at offset (0,-1) (-1,-2) or (-2,0) and new values introduced in order 0..2.

48, 1458, 4463, 40572, 351197, 3056856, 26631796, 233894638, 2060522620, 18133339314, 159409773544, 1403470741331, 12369772366128, 108977203894120, 959787320624928, 8456446218440229, 74528469200536291, 656752270728416591

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

OFFSET

1,1

COMMENTS

Row 7 of A275037.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

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

CROSSREFS

Cf. A275037.

Sequence in context: A089272 A004362 A160368 * A062195 A264322 A329776

Adjacent sequences: A275039 A275040 A275041 * A275043 A275044 A275045

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 14 2016

STATUS

approved