login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A193614 Number of n X n symmetric 0..7 arrays with no element equal to the sum mod 8 of all its horizontal and vertical neighbors 0
7, 343, 117649, 282480208, 4747561627592, 558545864083284007 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for 4X4

..4..0..0..7....4..0..0..1....4..0..0..6....4..0..4..4....4..0..0..7

..0..0..6..5....0..0..1..3....0..0..3..7....0..4..4..3....0..0..3..5

..0..6..0..4....0..1..4..3....0..3..7..7....4..4..7..6....0..3..7..2

..7..5..4..5....1..3..3..5....6..7..7..7....4..3..6..7....7..5..2..0

CROSSREFS

Sequence in context: A154024 A013712 A109493 * A194504 A347505 A015479

Adjacent sequences:  A193611 A193612 A193613 * A193615 A193616 A193617

KEYWORD

nonn

AUTHOR

R. H. Hardin Jul 31 2011

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 November 29 18:41 EST 2021. Contains 349416 sequences. (Running on oeis4.)