login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

Number of nX6 0..3 arrays with some element plus some horizontally, antidiagonally or vertically adjacent neighbor totalling three exactly once.
1

%I #4 Feb 20 2016 07:18:05

%S 1620,330192,46576336,6004186984,738478504448,88082672552208,

%T 10275566914040000,1178661175005532168,133416857282270562320,

%U 14941436920498380518848,1658672032118594665963168

%N Number of nX6 0..3 arrays with some element plus some horizontally, antidiagonally or vertically adjacent neighbor totalling three exactly once.

%C Column 6 of A269152.

%H R. H. Hardin, <a href="/A269150/b269150.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

%Y Cf. A269152.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 20 2016