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 A212659 #28 Feb 20 2024 13:18:38
%S A212659 1,2,12,112,212,1112,2212,2112,11112,21112,12112,22112,12212,22212,
%T A212659 111112,211112,121112,221112,122112,222112,112212,122212,222212,
%U A212659 1111112,2111112,1211112,2211112,1121112
%N A212659 Good's example of a "Standard List" of prime words over the alphabet {1,2}.
%C A212659 This is just one possible ordering of the list, given by Good in his Table 1. There are A001037(n) words of length n in the list, and they can be arranged in A001037(n)! ways. However, changing the order would also change the individual entries.
%C A212659 This sequence is well-defined only in the sense that it is in the order chosen by Good, who gives the 71 words of length <= 8. The sequence must be regarded as being undefined beyond that point.
%C A212659 For the rules that the list must satisfy, see pages 28-31 of Good.
%H A212659 I. J. Good, <a href="https://doi.org/10.1016/0097-3165(71)90004-5">The factorization of a sum of matrices and the multivariate cumulants of a set of quadratic expressions</a>, J. Combinatorial Theory Ser. A 11 1971 27--37. MR0274311 (43 #76).
%H A212659 I. J. Good, <a href="/A212659/a212659.jpg">Annotated scan of page 28</a>
%H A212659 I. J. Good, <a href="/A212659/a212659_1.jpg">Annotated scan of page 29</a>
%H A212659 I. J. Good, <a href="/A212659/a212659_2.jpg">Annotated scan of page 30</a>
%H A212659 I. J. Good, <a href="/A212659/a212659_3.jpg">Annotated scan of part of page 31</a>
%Y A212659 Cf. A001037, A212672.
%K A212659 nonn
%O A212659 1,2
%A A212659 _N. J. A. Sloane_, May 23 2012