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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A200426 Number of -4..4 arrays x(0..n+2) of n+3 elements with zero sum and no two or three adjacent elements summing to zero 1
248, 1830, 11008, 67852, 473034, 3397130, 24220966, 171351382, 1214558880, 8651325238, 61876262346, 443696753874, 3187550880360, 22937925283316, 165329774491030, 1193432351805558, 8626352984960916, 62427556201202018 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A200430

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..183

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

CROSSREFS

Sequence in context: A240967 A230856 A109478 * A109476 A121732 A028525

Adjacent sequences:  A200423 A200424 A200425 * A200427 A200428 A200429

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 17 2011

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 January 20 21:36 EST 2019. Contains 319336 sequences. (Running on oeis4.)