The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A226649 Fibonacci shuffles: a(2n) = A000071(n) and a(2n+1) = A001611(n+2). 2

%I #29 Sep 12 2018 18:22:04

%S 0,2,0,3,1,4,2,6,4,9,7,14,12,22,20,35,33,56,54,90,88,145,143,234,232,

%T 378,376,611,609,988,986,1598,1596,2585,2583,4182,4180,6766,6764,

%U 10947,10945,17712,17710,28658,28656,46369,46367,75026,75024,121394,121392,196419,196417,317812,317810

%N Fibonacci shuffles: a(2n) = A000071(n) and a(2n+1) = A001611(n+2).

%C a(2*n+1) = a(2*n) + A157725(n); a(2*n) = a(2*n-1) - 2 for n > 0. - _Reinhard Zumkeller_, Jul 30 2013

%H Reinhard Zumkeller, <a href="/A226649/b226649.txt">Table of n, a(n) for n = 0..10000</a>

%H <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (-1,1,1,1,1).

%F G.f. -x*(2+x^2+2*x^3+2*x) / ( (1+x)*(x^4+x^2-1) ). - _R. J. Mathar_, Jul 15 2013

%F a(n) + a(n+1) = A096748(n+2). - _R. J. Mathar_, Jul 15 2013

%F a(2n-1) - 1 = a(2n) + 1 = fib(n+1) = A000045(n+1) for n > 0. - _T. D. Noe_, Jul 23 2013

%t LinearRecurrence[{-1,1,1,1,1},{0,2,0,3,1},60] (* _Harvey P. Dale_, Sep 12 2018 *)

%o (Haskell)

%o import Data.List (transpose)

%o a226649 n = a226649_list !! n

%o a226649_list = concat $ transpose [a000071_list, drop 2 a001611_list]

%o -- _Reinhard Zumkeller_, Jul 30 2013

%Y Cf. A000071, A001611, A096748.

%K nonn,easy

%O 0,2

%A _V. T. Jayabalaji_, Jun 14 2013

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 June 9 04:57 EDT 2024. Contains 373227 sequences. (Running on oeis4.)