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 A056314 #10 Aug 22 2017 20:53:08 %S A056314 3,3,15,39,132,357,1131,3276,9945,29508,88935,265668,798252,2391441, %T A056314 7177584,21523320,64579920,193709763,581160255,1743392040,5230264026, %U A056314 15690529437,47071855131,141214764600 %N A056314 Number of primitive (aperiodic) reversible strings with n beads using a maximum of three different colors. %C A056314 A string and its reverse are considered to be equivalent. %D A056314 M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia. [See A056391 for pdf file of Chap. 2] %F A056314 Sum mu(d)*A032120(n/d) where d|n. %Y A056314 Column 3 of A284871. %Y A056314 Cf. A045625. %K A056314 nonn %O A056314 1,1 %A A056314 _Marks R. Nester_