cp's OEIS Frontend

A377477 Consider the nonadjacent form for n, then reverse the digits, leaving any trailing zeros alone, and take the absolute value.

%I A377477 #14 Dec 30 2024 16:07:55
%S A377477 0,1,2,3,4,5,6,7,8,9,10,19,12,13,14,15,16,17,18,11,20,21,38,35,24,29,
%T A377477 26,39,28,25,30,31,32,33,34,23,36,41,22,27,40,37,42,83,76,45,70,67,48,
%U A377477 61,58,51,52,77,78,71,56,57,50,79,60,49,62,63,64,65,66,47
%N A377477 Consider the nonadjacent form for n, then reverse the digits, leaving any trailing zeros alone, and take the absolute value.
%C A377477 A self-inverse permutation of the nonnegative integers.
%H A377477 Rémy Sigrist, <a href="/A377477/b377477.txt">Table of n, a(n) for n = 0..10921</a>
%H A377477 Joerg Arndt, <a href="http://www.jjj.de/fxt/#fxtbook">Matters Computational (The Fxtbook)</a>, pages 61-62.
%H A377477 Rémy Sigrist, <a href="/A377477/a377477.gp.txt">PARI program</a>
%H A377477 Wikipedia, <a href="https://en.wikipedia.org/wiki/Non-adjacent_form">Non-adjacent form</a>
%H A377477 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>
%F A377477 A184617(a(n)) = A057889(A184617(n)).
%e A377477 For n = 22: the nonadjacent form for 22 is "10T0T0" (where T denotes -1), reversing the digits and leaving any trailing zeros alone yields "T0T010", so a(22) = |- 2^5 - 2^3 + 2^1| =  38.
%o A377477 (PARI) \\ See Links section.
%Y A377477 See A160652 and A345201 for similar sequences.
%Y A377477 Cf. A057889, A184617, A379015.
%K A377477 nonn,base
%O A377477 0,3
%A A377477 _Rémy Sigrist_, Dec 28 2024