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 A244983 #16 Jul 22 2014 15:52:44 %S A244983 1,2,3,5,4,8,14,13,6,11,41,23,18,7,17,38,25,68,32,28,122,63,9,20,113, %T A244983 53,39,365,95,50,33,74,203,61,188,88,10,26,1094,158,83,46,608,313, %U A244983 3281,338,123,149,59,43,221,116,284,72,263,138,1013,12,9842,29,1823,248,98,563,172,60 %N A244983 Permutation of natural numbers: a(1) = 1, a(n) = (1 + A122111(A070003(n-1))) / 2. %H A244983 Antti Karttunen, <a href="/A244983/b244983.txt">Table of n, a(n) for n = 1..10001</a> %H A244983 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A244983 a(1) = 1, a(n) = (1 + A122111(A070003(n-1))) / 2. %F A244983 For all n >= 1, a(A244986(n+1)) = A006254(n). %o A244983 (Scheme) (define (A244983 n) (if (= 1 n) 1 (/ (+ 1 (A122111 (A070003 (- n 1)))) 2))) %Y A244983 Inverse: A244984. %Y A244983 Cf. A070003, A006254, A244986. %Y A244983 Related or similar permutations: A122111, A244981-A244982, A243505-A243506, A243065-A243066. %K A244983 nonn %O A244983 1,2 %A A244983 _Antti Karttunen_, Jul 21 2014