The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A259246 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing all changes.

A259246

Number of (n+1)X(4+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0011 or 0111
(history; published version)

#4 by R. H. Hardin at Mon Jun 22 13:14:09 EDT 2015

STATUS

editing

approved

#3 by R. H. Hardin at Mon Jun 22 13:14:05 EDT 2015

LINKS

R. H. Hardin, <a href="/A259246/b259246.txt">Table of n, a(n) for n = 1..210</a>

#2 by R. H. Hardin at Mon Jun 22 13:13:36 EDT 2015

NAME

allocated for R. H. Hardin

Number of (n+1)X(4+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0011 or 0111

DATA

111, 581, 2816, 14425, 71313, 361728, 1803859, 9106657, 45601304, 229700941, 1152550829, 5799573000, 29129216479, 146507741197, 736226561792, 3702139968817, 18608625262249, 93565783612448, 470365315223067

OFFSET

1,1

COMMENTS

Column 4 of A259250

FORMULA

Empirical: a(n) = 7*a(n-1) +12*a(n-2) -141*a(n-3) +15*a(n-4) +798*a(n-5) -177*a(n-6) -1505*a(n-7) -48*a(n-8) +375*a(n-9) -a(n-10) -6*a(n-11)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Cf. A259250

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin, Jun 22 2015

STATUS

approved

editing

#1 by R. H. Hardin at Mon Jun 22 13:08:59 EDT 2015

NAME

allocated for R. H. Hardin

KEYWORD

allocated

STATUS

approved