A269281 - OEIS

%I #4 Feb 21 2016 09:01:44

%S 0,2598156,938176344,279339197256,75556007986536,19356924219624936,

%T 4786284820998999528,1154228064358389881112,273210106596010141952520,

%U 63745055133289730721040968,14703244384392257014503473256

%N Number of 6Xn 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.

%C Row 6 of A269276.

%H R. H. Hardin, <a href="/A269281/b269281.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A269281/a269281.txt">Empirical recurrence of order 40</a>

%F Empirical recurrence of order 40 (see link above)

%e Some solutions for n=2

%e ..0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0

%e ..2..0. .2..1. .0..2. .0..2. .0..1. .2..0. .0..0. .2..2. .2..1. .0..1

%e ..1..3. .0..2. .3..0. .1..1. .0..0. .1..1. .3..2. .0..0. .1..1. .0..2

%e ..2..3. .0..0. .0..1. .0..0. .3..3. .3..1. .3..2. .3..1. .0..1. .2..1

%e ..1..0. .2..0. .0..2. .1..0. .3..1. .1..2. .3..3. .3..1. .1..0. .0..2

%e ..1..2. .0..0. .0..2. .1..0. .0..1. .3..1. .3..2. .3..2. .2..3. .0..1

%Y Cf. A269276.

%K nonn

%O 1,2

%A _R. H. Hardin_, Feb 21 2016