|
| |
|
|
A177706
|
|
Periodic sequence: Repeat 1, 1, 1, 1, 2.
|
|
2
|
|
|
|
1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,5
|
|
|
COMMENTS
|
Continued fraction expansion of (5+sqrt(65))/8.
Decimal expansion of 3704/33333.
a(n) = A130782(n+3).
|
|
|
LINKS
|
Table of n, a(n) for n=0..104.
|
|
|
FORMULA
|
a(n) = a(n-5) for n > 4; a(0) = 1, a(1) = 1, a(2) = 1, a(3) = 1, a(4) = 2.
G.f.: (1+x+x^2+x^3+2*x^4)/(1-x^5).
a(n) = 2-((n+1)^4 mod 5). - Paolo P. Lava, Jul 02 2010
a(n+4) = A198517(n+2)+A198517(n+1)+A198517(n). - Bruno Berselli, Nov 02 2011
|
|
|
PROG
|
(MAGMA) &cat[ [1, 1, 1, 1, 2]: k in [1..21] ];
|
|
|
CROSSREFS
|
Cf. A130782 (repeat 1, 1, 2, 1, 1), A177707 (decimal expansion of (5+sqrt(65))/8).
Sequence in context: A139549 A216915 A130782 * A055457 A032542 A107038
Adjacent sequences: A177703 A177704 A177705 * A177707 A177708 A177709
|
|
|
KEYWORD
|
nonn,cofr,easy
|
|
|
AUTHOR
|
Klaus Brockhaus, May 11 2010
|
|
|
STATUS
|
approved
|
| |
|
|
