A269108 - OEIS

%I #6 May 25 2024 23:04:19

%S 8748,8787660,6482020140,4227147007836,2579398703502996,

%T 1509593256271433868,858502190008810133292,478110059855042497842996,

%U 262048541877700400412558012,141832398849461215193264315676

%N Number of n X 7 0..3 arrays with some element plus some horizontally or vertically adjacent neighbor totalling three no more than once.

%C Column 7 of A269109.

%H R. H. Hardin, <a href="/A269108/b269108.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A269108/a269108.txt">Empirical recurrence of order 64</a>

%F Empirical recurrence of order 64 (see link above).

%e Some solutions for n=1

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

%Y Cf. A269109.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 19 2016