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A081241 Position in B of reversal of n-th term of B, where B is the logic-binary sequence, A007931. 2

%I #24 May 03 2019 21:42:33

%S 1,2,3,5,4,6,7,11,9,13,8,12,10,14,15,23,19,27,17,25,21,29,16,24,20,28,

%T 18,26,22,30,31,47,39,55,35,51,43,59,33,49,41,57,37,53,45,61,32,48,40,

%U 56,36,52,44,60,34,50,42,58,38,54,46,62,63,95,79,111,71,103,87,119,67

%N Position in B of reversal of n-th term of B, where B is the logic-binary sequence, A007931.

%C A self-inverse permutation of the natural numbers; a(n) = n if and only if A007931(n) is a palindrome.

%C The natural numbers written backwards digit-wise in bijective base-2 numeration, and interpreted forwards. - _Harald Korneliussen_, Apr 11 2019

%H Carl R. White, <a href="/A081241/b081241.txt">Table of n, a(n) for n = 1..16383</a>

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

%e A007931 = (1,2,11,12,21,22,111,112,121,122,211,...); and (reversal of term #8) = term #11.

%Y Cf. A007931.

%K base,easy,nonn,look

%O 1,2

%A _Clark Kimberling_, Mar 11 2003

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Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)