|
| |
|
|
A141035
|
|
Period 10: repeat 0, 0, 4, 2, -2, 4, 2, -4, -4, -2.
|
|
0
| |
|
|
0, 0, 4, 2, -2, 4, 2, -4, -4, -2, 0, 0, 4, 2, -2, 4, 2, -4, -4, -2, 0, 0, 4, 2, -2, 4, 2, -4, -4, -2, 0, 0, 4, 2, -2, 4, 2, -4, -4, -2, 0, 0, 4, 2, -2, 4, 2, -4, -4, -2, 0, 0, 4, 2, -2, 4, 2, -4, -4, -2, 0, 0, 4, 2, -2, 4, 2, -4, -4, -2, 0, 0, 4, 2, -2, 4, 2, -4, -4, -2, 0, 0, 4, 2, -2, 4, 2, -4, -4, -2, 0, 0, 4, 2, -2, 4, 2
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,3
|
|
|
LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (0,-1,0,-1,0,-1,0,-1).
|
|
|
FORMULA
| a(n)=-(1/5)*{(n mod 10)+[(n+1) mod 10]-3*[(n+3) mod 10]-[(n+4) mod 10]+3*[(n+5) mod 10]-2*[(n+6) mod 10]-[(n+7) mod 10]+2*[(n+8) mod 10]}, with n>=0 [From Paolo P. Lava, Aug 04 2008]
G.f. 2*x^2*(1+x)*(x^4+x^3+2*x^2-x+2) / ( (1+x+x^2+x^3+x^4)*(x^4-x^3+x^2-x+1) ). - R. J. Mathar, Oct 08 2011
|
|
|
CROSSREFS
| Sequence in context: A197154 A053879 A170988 * A100854 A194688 A021707
Adjacent sequences: A141032 A141033 A141034 * A141036 A141037 A141038
|
|
|
KEYWORD
| sign,easy,less
|
|
|
AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Jul 30 2008
|
| |
|
|
