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

 Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS"). Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A137662 Self-inverse permutation of the natural numbers, induced by A137661. 2

%I

%S 1,4,6,2,7,3,5,9,8,11,10,13,12,15,14,17,16,21,24,29,18,30,33,19,34,39,

%T 46,49,20,22,50,57,23,25,58,63,66,71,26,72,79,86,89,96,101,27,102,105,

%U 28,31,106,113,118,125,134,139,32,35,140,143,148,151,36,152,157,37,158

%N Self-inverse permutation of the natural numbers, induced by A137661.

%C a(a(n)) = n; A137661(a(n)) = A137661(n).

%H R. Zumkeller, <a href="/A137662/b137662.txt">Table of n, a(n) for n = 1..1000</a>

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

%K nonn

%O 1,2

%A _Reinhard Zumkeller_, Feb 04 2008

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.

Last modified November 27 04:21 EST 2020. Contains 338677 sequences. (Running on oeis4.)