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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A284335 Number of 2 X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero. 1

%I

%S 2,4,13,34,118,419,1481,5394,19848,73880,277222,1047495,3977615,

%T 15169751,58074521,223081286,859450114,3319751314,12852496680,

%U 49860496892,193783946748,754379484650,2941051327294,11481400024511,44875877924939

%N Number of 2 X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

%C Row 2 of A284334.

%H R. H. Hardin, <a href="/A284335/b284335.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

%Y Cf. A284334.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 25 2017

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.

Last modified April 1 16:25 EDT 2023. Contains 361695 sequences. (Running on oeis4.)