This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A246679 #8 Sep 11 2014 18:57:48 %S A246679 1,2,4,3,8,16,5,32,64,9,128,6,7,256,512,13,10,1024,21,2048,4096,11, %T A246679 8192,12,25,16384,18,33,32768,65536,19,26,131072,37,262144,524288,17, %U A246679 20,1048576,15,2097152,42,45,4194304,36,57,50,8388608,27,16777216,33554432,29,67108864,134217728,61,268435456,66,43,52,24,73,14 %N A246679 Permutation of natural numbers, even bisection of A246675 halved: a(n) = A246675(2*n)/2. %C A246679 Equally: even bisection of A246677 halved. %H A246679 Antti Karttunen, <a href="/A246679/b246679.txt">Table of n, a(n) for n = 1..1024</a> %H A246679 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A246679 a(n) = A246675(2*n)/2. %F A246679 a(n) = A246677(2*n)/2. %o A246679 (Scheme) (define (A246679 n) (/ (A246675 (* 2 n)) 2)) %Y A246679 Inverse: A246680. %Y A246679 Cf. A246675, A246677. %Y A246679 a(n) differs from A244153(n+1) for the first time at n=16, where a(16) = 13, while A244153(17) = 17. %K A246679 nonn %O A246679 1,2 %A A246679 _Antti Karttunen_, Sep 02 2014