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A333010 Lexicographically earliest sequence of distinct positive integers such that the concatenation of the binary representations of the odd-indexed terms equals the concatenation of the binary representations of the even-indexed terms. 2

%I #12 Mar 08 2020 13:39:51

%S 1,3,6,2,4,9,7,14,5,12,18,10,11,15,28,19,29,22,20,36,37,23,30,13,24,8,

%T 16,33,25,38,21,44,39,31,56,17,26,42,40,34,41,76,72,35,57,77,45,46,27,

%U 58,43,59,47,60,50,80,66,81,70,82,74,83,78,84,164,73,79

%N Lexicographically earliest sequence of distinct positive integers such that the concatenation of the binary representations of the odd-indexed terms equals the concatenation of the binary representations of the even-indexed terms.

%C In other words, the first and second bisections have the same binary digits.

%C This sequence is a binary variant of A329127.

%H Rémy Sigrist, <a href="/A333010/b333010.txt">Table of n, a(n) for n = 1..10000</a>

%H Rémy Sigrist, <a href="/A333010/a333010.gp.txt">PARI program for A333010</a>

%e The first terms, alongside their binary representation, are:

%e n a(n) bin(a(n))

%e -- ---- -----------------------------

%e 1 1 1

%e 2 3 11

%e 3 6 110

%e 4 2 10

%e 5 4 100

%e 6 9 1001

%e 7 7 111

%e 8 14 1110

%e 9 5 101

%e 10 12 1100

%e 11 18 10010

%e 12 10 1010

%e 13 11 1011

%e 14 15 1111

%e 15 28 11100

%e 16 19 10011

%o (PARI) See Links section.

%Y Cf. A329127.

%K nonn,base

%O 1,2

%A _Rémy Sigrist_, Mar 05 2020

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Last modified May 5 10:46 EDT 2024. Contains 372275 sequences. (Running on oeis4.)