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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A246739 Number of length 2+4 0..n arrays with no pair in any consecutive five terms totalling exactly n 1
2, 16, 260, 1096, 5430, 15960, 47432, 109552, 246890, 483520, 920652, 1606776, 2735390, 4392136, 6907280, 10419040, 15447762, 22202352, 31455380, 43507240, 59453702, 79710136, 105775320, 138205776, 178991930, 228860320, 290390492 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A246737

LINKS

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

FORMULA

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A140307 A114039 A090305 * A283685 A197458 A050974

Adjacent sequences:  A246736 A246737 A246738 * A246740 A246741 A246742

KEYWORD

nonn

AUTHOR

R. H. Hardin, Sep 02 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified February 19 14:31 EST 2018. Contains 299334 sequences. (Running on oeis4.)