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!)
A249080 Number of length n+5 0..3 arrays with every six consecutive terms having two times the sum of some two elements equal to the sum of the remaining four 1
1324, 1944, 2844, 4136, 5964, 8504, 11964, 18884, 29484, 45428, 68892, 102564, 149644, 243804, 391596, 618620, 958668, 1453724, 2153964, 3554444, 5775660, 9219020, 14417004, 22033164, 32862124, 54520044, 89029164, 142746476 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A249085

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +30*a(n-6) -30*a(n-7) -280*a(n-12) +280*a(n-13) +960*a(n-18) -960*a(n-19) -1024*a(n-24) +1024*a(n-25)

EXAMPLE

Some solutions for n=6

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

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

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

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

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A186469 A145754 A020403 * A248984 A202374 A259415

Adjacent sequences:  A249077 A249078 A249079 * A249081 A249082 A249083

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 20 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 October 26 17:32 EDT 2020. Contains 338027 sequences. (Running on oeis4.)