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!)
A115008 a(n) = a(n-1)+a(n-3)+a(n-4). 4
1, 0, 2, 4, 5, 7, 13, 22, 34, 54, 89, 145, 233, 376, 610, 988, 1597, 2583, 4181, 6766, 10946, 17710, 28657, 46369, 75025, 121392, 196418, 317812, 514229, 832039, 1346269, 2178310, 3524578, 5702886, 9227465, 14930353, 24157817, 39088168 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
COMMENTS
a(2n) = F(2n+1) = A001519(n). a(n+2) - a(n+1) - a(n) gives match to A000034, apart from signs.
LINKS
FORMULA
G.f. -(1-x+2*x^2+x^3)/((1+x^2)*(x^2+x-1))
a(2n+1) = (-1)^(n+1) + A001906(n+1) (compare with a similar property for A116697) - Creighton Dement, Mar 31 2006
CROSSREFS
Sequence in context: A328845 A240842 A168540 * A275368 A332296 A115883
KEYWORD
easy,nonn
AUTHOR
Creighton Dement, Feb 23 2006
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 March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)