|
Search: id:A131707
|
|
|
| A131707 |
|
Period 12: repeat 1, 1, 3, 7, 7, 1, 9, 9, 7, 3, 3, 9 . |
|
+0
8
|
|
| 1, 1, 3, 7, 7, 1, 9, 9, 7, 3, 3, 9, 1, 1, 3, 7, 7, 1, 9, 9, 7, 3, 3, 9, 1, 1, 3, 7, 7, 1, 9, 9, 7, 3, 3, 9, 1, 1, 3, 7, 7, 1, 9, 9, 7, 3, 3, 9, 1, 1, 3, 7, 7, 1, 9, 9, 7, 3, 3, 9, 1, 1, 3, 7, 7, 1, 9, 9, 7, 3, 3, 9, 1, 1, 3, 7, 7, 1, 9, 9, 7, 3, 3, 9, 1, 1, 3, 7, 7, 1, 9, 9, 7, 3, 3, 9, 1, 1, 3, 7, 7, 1, 9, 9, 7
(list; graph; listen)
|
|
|
OFFSET
|
0,3
|
|
|
COMMENT
|
Also the decimal expansion of 1023949/9000009. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 07 2009]
|
|
FORMULA
|
a(n)=(1/66)*{49*(n mod 12)-28*[(n+1) mod 12]+5*[(n+2) mod 12]+27*[(n+3) mod 12]+16*[(n+4) mod 12]+5*[(n+5) mod 12]-39*[(n+6) mod 12]+38*[(n+7) mod 12]+5*[(n+8) mod 12]-17*[(n+9) mod 12]-6*[(n+10) mod 12]+5*[(n+11) mod 12]}, with n>=0 - Paolo P. Lava (ppl(AT)spl.at), Oct 02 2007
G.f.: (1+2x^2+4x^3-6x^5+9x^6)/((1-x)(1+x^2)(1-x^2+x^4)). a(n)=a(n-1)-a(n-6)+a(n-7). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 07 2009]
|
|
CROSSREFS
|
Cf. A131711.
Sequence in context: A013564 A009467 A131608 this_sequence A016620 A021269 A021730
Adjacent sequences: A131704 A131705 A131706 this_sequence A131708 A131709 A131710
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
Paul Curtz (bpcrtz(AT)free.fr), Sep 14 2007
|
|
EXTENSIONS
|
More terms from Tracy Poff (tracy.poff(AT)gmail.com), Dec 21 2008
Even more periods from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 07 2009
|
|
|
Search completed in 0.003 seconds
|
