login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A267224 Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its west, northeast or southeast neighbor modulo 4 and the upper left element equal to 0. 1

%I

%S 6,35,458,7137,127262,2409733,47615756,971807573,20350582884,

%T 435153995835,9465755318980,208865043851697,4664235238647148,

%U 105225575250055043,2394702914722332876,54911344462256296581

%N Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its west, northeast or southeast neighbor modulo 4 and the upper left element equal to 0.

%C Row 4 of A267222.

%H R. H. Hardin, <a href="/A267224/b267224.txt">Table of n, a(n) for n = 1..19</a>

%e Some solutions for n=4

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

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

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

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

%Y Cf. A267222.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 12 2016

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 21 04:00 EDT 2021. Contains 348141 sequences. (Running on oeis4.)