The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A204622 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing all changes.

A204622

Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having unequal diagonal elements or unequal antidiagonal elements, and new values 0..2 introduced in row major order
(history; published version)

#6 by Russ Cox at Sat Mar 31 12:37:02 EDT 2012

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net) _ Jan 17 2012

Discussion

Sat Mar 31

12:37

OEIS Server: https://oeis.org/edit/global/875

#5 by Ron Hardin at Tue Jan 17 15:41:46 EST 2012

STATUS

editing

approved

#4 by Ron Hardin at Tue Jan 17 15:41:42 EST 2012

LINKS

R. H. Hardin, <a href="/A204622/b204622.txt">Table of n, a(n) for n = 1..11</a>

#3 by Ron Hardin at Tue Jan 17 15:41:12 EST 2012

NAME

allocated for Ron HardinNumber of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having unequal diagonal elements or unequal antidiagonal elements, and new values 0..2 introduced in row major order

DATA

12, 2049, 2490558, 21550390395, 1327448018292252, 582081449451902347866, 1816995451072561641887723586, 40376415985445663379679403072064855, 6387126785648912581213165822171077074078454

OFFSET

1,1

COMMENTS

Diagonal of A204630

EXAMPLE

Some solutions for n=3

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

..1..0..1..0....1..1..0..2....0..1..2..0....1..1..0..1....1..2..1..2

..2..1..1..0....2..0..2..1....1..2..2..0....2..2..1..1....0..1..0..1

..2..0..0..0....1..2..1..0....0..1..1..2....1..1..0..0....2..0..0..1

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Jan 17 2012

STATUS

approved

editing

#2 by Ron Hardin at Tue Jan 17 15:39:46 EST 2012

KEYWORD

allocating

allocated

#1 by Ron Hardin at Tue Jan 17 15:39:46 EST 2012

NAME

allocated for Ron Hardin

KEYWORD

allocating

STATUS

approved