login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A209844 Number of (n+1)X5 0..3 arrays with every 2X2 subblock having one or two distinct values, and new values 0..3 introduced in row major order 1
1331, 59563, 2713195, 128454587, 6168792219, 299013108267, 14575079152523, 713014417713003, 34962135163411115, 1716944820423706411, 84400236210902350123, 4151550346703285808683, 204295483850467630497195 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A209848

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 101*a(n-1) -3119*a(n-2) +23301*a(n-3) +332146*a(n-4) -4841510*a(n-5) +189458*a(n-6) +228888364*a(n-7) -753564284*a(n-8) -2816048344*a(n-9) +16949078144*a(n-10) -1771169504*a(n-11) -117752841744*a(n-12) +156873217312*a(n-13) +244896903072*a(n-14) -582512363712*a(n-15) -47046663680*a(n-16) +765499169280*a(n-17) -294034673664*a(n-18) -383848898560*a(n-19) +236348588032*a(n-20) +55918985216*a(n-21) -46495170560*a(n-22) -1491075072*a(n-23) +1811939328*a(n-24)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A017283 A017391 A017655 * A227475 A036528 A052052

Adjacent sequences:  A209841 A209842 A209843 * A209845 A209846 A209847

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 14 2012

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 28 09:09 EDT 2022. Contains 354112 sequences. (Running on oeis4.)