The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A230511 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing all changes.

A230511

Number of nX4 0..7 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 8, and upper left element zero
(history; published version)

#4 by R. H. Hardin at Mon Oct 21 20:50:04 EDT 2013

STATUS

editing

approved

#3 by R. H. Hardin at Mon Oct 21 20:50:00 EDT 2013

LINKS

R. H. Hardin, <a href="/A230511/b230511.txt">Table of n, a(n) for n = 1..24</a>

#2 by R. H. Hardin at Mon Oct 21 20:49:45 EDT 2013

NAME

allocated for R. H. Hardin

Number of nX4 0..7 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 8, and upper left element zero

DATA

0, 2, 170, 4648, 129874, 4038314, 129829460, 4177480490, 133348597190, 4239583476464, 134710145140230, 4281665864448554, 136114979870612832, 4327211619948091138, 137562471021655686798, 4373060580042549915844

OFFSET

1,2

COMMENTS

Column 4 of A230513

EXAMPLE

Some solutions for n=3

..0..1..2..3....0..1..2..3....0..3..2..1....0..1..0..7....0..7..0..7

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

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

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin, Oct 21 2013

STATUS

approved

editing

#1 by R. H. Hardin at Mon Oct 21 20:46:28 EDT 2013

NAME

allocated for R. H. Hardin

KEYWORD

allocated

STATUS

approved