login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A255074 Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum one and no antidiagonal sum one 1
208, 2704, 103929, 4906225, 442721280, 87959696400, 29652533456379, 18203258527980304, 22357815257396827080, 49610361490350558051961, 199432453303213933029482554, 1523887036252507934951348001529 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A255082

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..19

EXAMPLE

Some solutions for n=3

..0..1..1..0..0....0..0..0..1..1....0..0..1..1..1....1..0..1..1..0

..0..1..1..1..1....0..1..1..0..1....0..1..1..1..0....1..1..1..1..0

..1..1..1..0..1....1..0..1..1..0....0..1..1..1..1....0..1..1..1..0

..0..1..1..1..1....1..1..0..1..1....1..1..1..1..0....1..1..1..1..0

..0..1..1..1..0....1..1..1..0..1....0..0..1..0..1....0..1..1..1..1

CROSSREFS

Cf. A255082

Sequence in context: A184681 A235674 A235444 * A172967 A231111 A223252

Adjacent sequences:  A255071 A255072 A255073 * A255075 A255076 A255077

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 14 2015

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 19 12:05 EDT 2019. Contains 328217 sequences. (Running on oeis4.)