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!)
A248985 Number of length n+4 0..6 arrays with every five consecutive terms having two times the sum of some three elements equal to three times the sum of the remaining two 1
2817, 4137, 6065, 8873, 12937, 18737, 30017, 47953, 76161, 119849, 185817, 315929, 533433, 891593, 1468537, 2367257, 4153753, 7216889, 12373897, 20836977, 34213297, 60900465, 107177641, 185861593, 316071033, 523226617, 937146425 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A248987

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +39*a(n-5) -39*a(n-6) -570*a(n-10) +570*a(n-11) +4091*a(n-15) -4091*a(n-16) -15591*a(n-20) +15591*a(n-21) +31408*a(n-25) -31408*a(n-26) -30261*a(n-30) +30261*a(n-31) +8974*a(n-35) -8974*a(n-36) +872*a(n-40) -872*a(n-41) +3008*a(n-45) -3008*a(n-46) -1024*a(n-50) +1024*a(n-51)

EXAMPLE

Some solutions for n=6

..0....0....5....4....0....1....0....2....3....6....6....0....0....6....3....5

..3....3....1....1....1....3....3....0....1....5....5....2....6....0....0....4

..3....0....3....2....1....6....0....6....5....0....5....1....3....6....1....4

..0....0....0....3....0....5....6....3....0....3....6....3....5....5....1....2

..4....2....1....0....3....5....6....4....6....6....3....4....6....3....0....5

..0....0....0....4....5....1....0....2....3....6....6....5....5....1....3....5

..3....3....1....1....1....3....3....5....6....0....5....2....6....0....5....4

..3....0....3....2....1....6....5....6....0....5....0....6....3....1....6....4

..0....0....5....3....0....5....6....3....0....3....6....3....5....0....1....2

..4....2....6....0....3....0....6....4....6....6....3....4....6....3....5....0

CROSSREFS

Sequence in context: A202375 A236135 A179159 * A236794 A182151 A182085

Adjacent sequences:  A248982 A248983 A248984 * A248986 A248987 A248988

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 18 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 25 07:33 EDT 2020. Contains 337335 sequences. (Running on oeis4.)