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!)
A252771 Number of (n+2)X(1+2) 0..3 arrays with every consecutive three elements in every row, column and nw-se diagonal having exactly two distinct values, and new values 0 upwards introduced in row major order 1

%I

%S 234,1028,4687,22295,105956,507049,2429173,11652188,55960799,

%T 268783174,1291581364,6207376902,29836567197,143422264585,

%U 689472936242,3314565767875,15934867914351,76608704638459,368308600684650

%N Number of (n+2)X(1+2) 0..3 arrays with every consecutive three elements in every row, column and nw-se diagonal having exactly two distinct values, and new values 0 upwards introduced in row major order

%C Column 1 of A252777

%H R. H. Hardin, <a href="/A252771/b252771.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A252771/a252771.txt">Empirical recurrence of order 63</a>

%F Empirical recurrence of order 63 (see link above)

%e Some solutions for n=4

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 21 2014

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 May 22 02:18 EDT 2022. Contains 353933 sequences. (Running on oeis4.)