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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A254850 Number of (n+2) X (4+2) 0..1 arrays with no 3 X 3 subblock diagonal sum one and no antidiagonal sum two. 1

%I #6 Jan 20 2024 17:37:01

%S 4624,6889,13456,37636,99856,271441,729316,1996569,5466244,15202201,

%T 41550916,113891584,307932304,843379681,2298435364,6356553984,

%U 17355427600,47726519296,129502098496,355212424009,966505272100

%N Number of (n+2) X (4+2) 0..1 arrays with no 3 X 3 subblock diagonal sum one and no antidiagonal sum two.

%C Column 4 of A254854.

%H R. H. Hardin, <a href="/A254850/b254850.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A254854.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 08 2015

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 August 12 15:11 EDT 2024. Contains 375113 sequences. (Running on oeis4.)