login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A242319 Number of length n+4+2 0..4 arrays with every value 0..4 appearing at least once in every consecutive 4+3 elements, and new values 0..4 introduced in order 1
140, 440, 1300, 3648, 10012, 27368, 75236, 208976, 577964, 1596216, 4408020, 12176768, 33645500, 92967176, 256849892, 709617776, 1960543660, 5416680632, 14965468916, 41347189280, 114235439996, 315613828040, 871989852740 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A242322

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +2*a(n-2) +4*a(n-3) +6*a(n-4) +10*a(n-5) +12*a(n-6) -4*a(n-7) -6*a(n-8) -6*a(n-9) -2*a(n-11) -2*a(n-12) +a(n-14) +a(n-15)

EXAMPLE

Some solutions for n=5

..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0

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

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

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

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

..2....0....4....0....4....0....4....3....4....4....4....3....3....2....4....1

..4....4....1....4....0....4....0....4....0....1....1....4....4....4....1....4

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

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

..0....2....0....4....2....0....2....2....1....2....3....4....2....0....1....2

..3....1....4....4....0....3....4....3....1....4....0....1....4....4....4....3

CROSSREFS

Sequence in context: A196447 A255783 A255776 * A010080 A250801 A184386

Adjacent sequences:  A242316 A242317 A242318 * A242320 A242321 A242322

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 10 2014

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 23 17:05 EDT 2021. Contains 347618 sequences. (Running on oeis4.)