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!)
A251401 Number of (n+1)X(7+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements 1

%I #4 Dec 02 2014 13:46:31

%S 1856748750,61144538351375,1996093452861010528,

%T 65265944559607354012467,2133718605852583377537309624,

%U 69758457677840521663637000916478,2280638230704458493043162111553219014

%N Number of (n+1)X(7+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements

%C Column 7 of A251402

%H R. H. Hardin, <a href="/A251401/b251401.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=1

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 02 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 April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)