[go: up one dir, main page]
login
The OEIS is supported by the many generous donors to the OEIS Foundation.
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A193223
Number of n X n symmetric 0..5 arrays with no element equal to the sum mod 6 of any two of its horizontal and vertical neighbors
0
6, 123, 5571, 643473, 194123061, 159836740359, 373087393798011, 2568694794232177467
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Table of n, a(n) for n=1..8.
EXAMPLE
Some solutions for 4X4
..3..0..5..1....3..0..2..1....0..1..3..5....3..3..4..4....3..3..3..3
..0..2..0..5....0..1..4..1....1..3..3..3....3..4..3..3....3..1..5..1
..5..0..5..2....2..4..5..4....3..3..4..3....4..3..3..4....3..5..3..5
..1..5..2..2....1..1..4..4....5..3..3..1....4..3..4..3....3..1..5..3
CROSSREFS
Sequence in context: A356199 A078261 A239752 * A372920 A132507 A223112
Adjacent sequences: A193220 A193221 A193222 * A193224 A193225 A193226
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 18 2011
STATUS
approved

Lookup Welcome Wiki Register Music Plot 2 Demos Index WebCam Contribute Format Style Sheet Transforms Superseeker Recents
The OEIS Community
Maintained by The OEIS Foundation Inc.
Last modified November 7 20:40 EST 2024. Contains 377536 sequences.
License Agreements, Terms of Use, Privacy Policy