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!)
A265623 Number of 5Xn 0..5*n-1 arrays with upper left zero and lower right 5*n-1 and each element differing from its horizontal and diagonal neighbors by a power of two. 0

%I #3 Dec 10 2015 12:39:00

%S 125,86800,147336019,283374980138,1819521260530360,272537666067980991,

%T 2836220162505763363250,2343924370920894151804111,

%U 23094563458334697286346784805

%N Number of 5Xn 0..5*n-1 arrays with upper left zero and lower right 5*n-1 and each element differing from its horizontal and diagonal neighbors by a power of two.

%C Row 5 of A265619.

%e Some solutions for n=2

%e ..0..4....0..8....0..1....0..4....0..1....0..1....0..1....0..4....0..2....0..2

%e ..7..8....3..2....3..4....2..1....6..2....7..8....6..8....0..1....8..4....4..2

%e ..9..5....8..4....8..4....5..6....0..2....7..3....8..7....7..8....5..6....6..8

%e ..7..8....8..0....5..4....8..6....5..4....7..9....8..4....5..3....5..3....8..4

%e ..8..9....7..9....1..9....7..9....1..9....5..9....5..9....7..9....1..9....8..9

%Y Cf. A265619.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 10 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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 3 23:03 EDT 2024. Contains 375679 sequences. (Running on oeis4.)