|
|
A096230
|
|
Period 5: repeat [9, 7, 5, 3, 1].
|
|
1
|
|
|
9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1, 9, 7, 5, 3, 1
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
Decimal expansion of 9 + 1/2 + 1/4 + 1/313 + 1/378244 + 1/2959729702407 = 975310/99999. - Bruno Berselli, Oct 02 2018
|
|
LINKS
|
|
|
FORMULA
|
a(n) = 1 + 2*(-n mod 5). [From Wilson Mathematica program (2004)]
a(n) = 9 - (2*(n-1) mod 10). [From Greathouse PARI program (2014)]
G.f.: (9 + 7*x + 5*x^2 + 3*x^3 + x^4)/(1 - x^5).
a(n) = a(n-5).
a(n) + a((a(n)+1)/2) = 10. (End)
|
|
MAPLE
|
|
|
MATHEMATICA
|
|
|
PROG
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|