login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A269659 Number of length-6 0..n arrays with no adjacent pair x,x+1 repeated. 1
42, 626, 3816, 15036, 45590, 115902, 259476, 527576, 994626, 1764330, 2976512, 4814676, 7514286, 11371766, 16754220, 24109872, 33979226, 47006946, 63954456, 85713260, 113318982, 147966126, 191023556, 244050696, 308814450, 387306842 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 6 of A269656.

LINKS

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

FORMULA

Empirical: a(n) = n^6 + 6*n^5 + 15*n^4 + 14*n^3 + 3*n^2 + 3*n

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

CROSSREFS

Cf. A269656.

Sequence in context: A279888 A104901 A091962 * A007746 A200853 A214945

Adjacent sequences:  A269656 A269657 A269658 * A269660 A269661 A269662

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 02 2016

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified February 20 01:26 EST 2018. Contains 299357 sequences. (Running on oeis4.)