The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.



(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A227370 Permutation which maps between A227368 and A227369. 4


%S 0,1,2,4,3,6,5,8,7,9,10,11,12,13,14,16,15,18,17,20,19,22,21,24,23,25,

%T 26,27,28,29,30,31,32,33,34,36,35,38,37,40,39,42,41,44,43,46,45,48,47,

%U 49,50,51,52,53,54,55,56,57,58,59,60,61,62,64,63,66,65,68,67

%N Permutation which maps between A227368 and A227369.

%C Conjecture 1: This is an involution (self-inverse permutation) of nonnegative integers. (Which would imply that both formulas given in A227368 and A227369 involving A227370 are valid).

%C Conjecture 2: (which would automatically imply the conjecture 1): the only transpositions (used to compose the permutation) are of adjacent terms 2k-1 and 2k, where A061887 gives the values of k. This is true at least for the first 35 transpositions (up to k=60).

%C See the example section of A227368 to get a grasp of the problem.

%H Antti Karttunen, <a href="/A227370/b227370.txt">Table of n, a(n) for n = 0..132</a>

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

%F a(n) = A227183(A227369(n)).

%o (Scheme) (define (A227370 n) (A227183 (A227369 n)))

%Y Cf. A227368, A227369, A061887.

%K nonn

%O 0,3

%A _Antti Karttunen_, Jul 08 2013

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 24 09:10 EDT 2021. Contains 347630 sequences. (Running on oeis4.)