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!)
A244182 Number of length n+4 0..7 arrays with no five consecutive elements with pattern ababa or abbba (possibly a=b) and new values 0..7 introduced in 0..7 order 1
49, 189, 812, 3832, 19611, 107818, 631917, 3920234, 25559691, 173884143, 1225577275, 8889979382, 65971409679, 498317038285, 3815480847788, 29515868843207, 230098500219893, 1804162547508522, 14206951882147476 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A244185

LINKS

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

FORMULA

Empirical: a(n) = 16*a(n-1) -57*a(n-2) -146*a(n-3) +471*a(n-4) +2030*a(n-5) +1606*a(n-6) -9926*a(n-7) -40696*a(n-8) -72180*a(n-9) -23242*a(n-10) +262788*a(n-11) +948320*a(n-12) +2028394*a(n-13) +3106669*a(n-14) +3270400*a(n-15) +1237472*a(n-16) -4174278*a(n-17) -13394281*a(n-18) -25599412*a(n-19) -38689072*a(n-20) -49852288*a(n-21) -56526936*a(n-22) -57307380*a(n-23) -52390492*a(n-24) -43372994*a(n-25) -32559403*a(n-26) -22139372*a(n-27) -13590504*a(n-28) -7488422*a(n-29) -3670971*a(n-30) -1580476*a(n-31) -586225*a(n-32) -181844*a(n-33) -44951*a(n-34) -8042*a(n-35) -840*a(n-36)

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A244179 A244180 A244181 * A244183 A244184 A251214

Adjacent sequences: A244179 A244180 A244181 * A244183 A244184 A244185

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 21 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 30 03:32 EST 2023. Contains 359939 sequences. (Running on oeis4.)