login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A301781 Number of nX5 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero. 1

%I #4 Mar 26 2018 16:26:04

%S 16,512,13616,369936,10033408,272151040,7381982784,200232929792,

%T 5431228387584,147319630168320,3995978796839936,108389129977399296,

%U 2940006465162900480,79746354795922395136,2163084053927246327808

%N Number of nX5 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.

%C Column 5 of A301784.

%H R. H. Hardin, <a href="/A301781/b301781.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 24*a(n-1) +92*a(n-2) -156*a(n-3) -1088*a(n-4) -480*a(n-5) +3200*a(n-6) +3200*a(n-7) -4608*a(n-8)

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A301784.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 26 2018

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 25 09:49 EDT 2024. Contains 371967 sequences. (Running on oeis4.)