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!)
A277695 Permutation of natural numbers: a(1) = 1; for n > 1, if A277815(n) = 0, a(n) = 2*a(A277814(n)-1), otherwise a(n) = 1 + 2*a(A277815(n)). 6

%I #9 Nov 07 2016 09:10:21

%S 1,2,4,8,3,16,6,32,12,5,13,64,7,24,10,26,128,14,27,17,25,49,48,20,257,

%T 11,21,52,15,256,28,54,34,50,55,98,515,99,9,65,31,29,97,105,51,96,40,

%U 514,22,101,43,35,1031,513,81,42,69,23,57,104,63,30,512,56,108,68,111,100,139,199,163,110,196,203,19,211,2063,33,195,53,1030,47

%N Permutation of natural numbers: a(1) = 1; for n > 1, if A277815(n) = 0, a(n) = 2*a(A277814(n)-1), otherwise a(n) = 1 + 2*a(A277815(n)).

%H Antti Karttunen, <a href="/A277695/b277695.txt">Table of n, a(n) for n = 1..10000</a>

%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>

%F a(1) = 1; for n > 1, if A277815(n) = 0 [when n is in A277817], a(n) = 2*a(A277814(n)-1), otherwise a(n) = 1 + 2*a(A277815(n)).

%F a(1) = 1, a(A277817(1+n)) = 2*a(n), a(A277816(n)) = 1 + 2*a(n). [Implicit form.]

%o (Scheme, with memoization-macro definec)

%o (definec (A277695 n) (cond ((= 1 n) n) ((zero? (A277815 n)) (* 2 (A277695 (+ -1 (A277814 n))))) (else (+ 1 (* 2 (A277695 (A277815 n)))))))

%Y Inverse: A277696.

%Y Cf. A264977, A277710, A277814, A277815, A277816, A277817.

%K nonn

%O 1,2

%A _Antti Karttunen_, Nov 06 2016

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 July 15 18:49 EDT 2024. Contains 374333 sequences. (Running on oeis4.)