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A269294 Number of 6Xn 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three no more than once. 1
4096, 3306744, 1085203980, 309846524148, 81907569617580, 20680187784811380, 5062027330721456172, 1211690913720475660164, 285185178252679536489420, 66240633180683878759737972, 15223317892237120439440690380 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 6 of A269289.

LINKS

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

R. H. Hardin, Empirical recurrence of order 40

FORMULA

Empirical recurrence of order 40 (see link above)

EXAMPLE

Some solutions for n=2

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

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

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

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

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

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

CROSSREFS

Cf. A269289.

Sequence in context: A224208 A017034 A017118 * A221093 A017214 A017322

Adjacent sequences:  A269291 A269292 A269293 * A269295 A269296 A269297

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 21 2016

STATUS

approved

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Last modified May 29 15:44 EDT 2020. Contains 334704 sequences. (Running on oeis4.)