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 A210604 #49 Apr 12 2014 00:55:41 %S A210604 0,3,2,13,12,11,10,9,8,43,42,41,42,43,44,45,46,113,114,39,38,37,36,35, %T A210604 34,33,32,31,30,29,28,27,26,157,156,155,154,153,152,153,154,155,156, %U A210604 157,158,159,160,161,162,163,164,367,368,369,370,151,152 %N A210604 Bisection of Recamán's sequence A005132. %C A210604 Also length of the horizontal edges of a rectangular polyspiral path. For the vertical edges see A210605. The mentioned polyspiral path is one of the three views of a rectangular polyhelix which is a three-dimensional graphical representation of Recamán's sequence A005132. %H A210604 <a href="/index/Rea#Recaman">Index entries for sequences related to Recamán's sequence</a> %e A210604 1) Written as an irregular array in which each row lists consecutive numbers in ascending order or in descending order: %e A210604 0; %e A210604 3,2; %e A210604 13,12,11,10,9,8; %e A210604 43,42,41; %e A210604 42,43,44,45,46; %e A210604 113,114; %e A210604 39,38,37,36,35,34,33,32,31,30,29,28,27,26; %e A210604 ... %e A210604 2) Written as an irregular array in which each row lists consecutive numbers in ascending order, in descending order or in descending-ascending order: %e A210604 0; %e A210604 3,2; %e A210604 13,12,11,10,9,8; %e A210604 43,42,41,42,43,44,45,46; %e A210604 113,114; %e A210604 39,38,37,36,35,34,33,32,31,30,29,28,27,26; %e A210604 ... %Y A210604 Cf. A005132, A065056, A171175, A171178, A210605-A210607. %K A210604 nonn,tabf %O A210604 1,2 %A A210604 _Omar E. Pol_, Mar 23 2012