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 A111944 #19 Jul 10 2025 18:19:39 %S A111944 1,1,2,1,2,3,2,1,3,3,2,4,2,3,4,1,3,5,2,4,5,3,2,5,3,3,4,4,2,7,2,1,4,5, %T A111944 6,7,2,3,6,5,3,9,2,4,9,3,2,6,3,5,4,4,2,7,6,5,4,3,2,10,2,3,6,1,5,7,2,7, %U A111944 6,11,2,9,3,3,7,4,6,11,2,6,5,5,2,13,6,3,5,5,2,17,5,4,6,3,6,7,3,5,7,7 %N A111944 Number of different lengths of cycles for vectors of length n under the Ducci map. %C A111944 Total number of cycles is given by A135547. %H A111944 Max Alekseyev, <a href="/A111944/b111944.txt">Table of n, a(n) for n = 1..420</a> %H A111944 N. J. Calkin, J. G. Stevens, D. M. Thomas, <a href="https://www.math.clemson.edu/~calkin/Papers/calkin_stevens_thomas.pdf">A characterization for the lengths of cycles of the n-number Ducci game</a>, Fib. Q. 43(1), 2005, 53-59. %Y A111944 Cf. A038553. %K A111944 nonn %O A111944 1,3 %A A111944 _N. J. A. Sloane_, Nov 27 2005 %E A111944 Terms a(1), a(2), and a(41) onward from _Max Alekseyev_, Oct 12 2013