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!)
A248997 Number of length n+4 0..4 arrays with no five consecutive terms having two times the sum of any three elements equal to three times the sum of the remaining two 1
2540, 10360, 42308, 172888, 706704, 2888944, 11810564, 48286456, 197422012, 807188768, 3300330556, 13494048552, 55173290154, 225588339824, 922369809354, 3771323457556, 15419939994758, 63048058448056, 257786893864722 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A249001

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A254021 A254014 A254888 * A234407 A135924 A250686

Adjacent sequences:  A248994 A248995 A248996 * A248998 A248999 A249000

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 May 31 18:52 EDT 2020. Contains 334748 sequences. (Running on oeis4.)