login
Number of 5 X n 0..1 arrays with every element equal to 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.
1

%I #6 May 14 2021 15:28:11

%S 0,34,16,177,1197,6501,47363,284691,1896274,11958940,77618802,

%T 496896121,3200790736,20562842467,132258652196,850233622346,

%U 5467032295429,35149594609278,226000413555323,1453078724543374,9342715834996198

%N Number of 5 X n 0..1 arrays with every element equal to 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.

%C Row 5 of A301823.

%H R. H. Hardin, <a href="/A301826/b301826.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A301823.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 27 2018