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 A133651 #5 Mar 30 2012 17:27:54 %S A133651 212,214,215,216,217,218,219,221,231,312,313,321,322,323,325,326,327, %T A133651 328,329,331,332,342,421,423,424,432,433,434,436,437,438,439,441,442, %U A133651 443,453,521,532,534,535,543,544,545,547,548,549,551,552,553,554,564 %N A133651 Early bird numbers of order 3. %C A133651 N-th Early bird number of order 2 is in the sequence if it occurs in the concatenation of the first n-1 early bird numbers of order 2. %H A133651 Klaus Brockhaus, <a href="/A133651/b133651.txt">Table of n, a(n) for n = 1..1000</a> %e A133651 A133650(13) = 212 occurs in the concatenation 99111122123132142152162172182192211 of A133650(1), ..., A133650(12). Hence 212 is an early bird number of order 3. %o A133651 For JBASIC program see A133651 (order = 3; maxterm = 600). %Y A133651 Cf. A116700 (early bird numbers), A133650 (early bird numbers of order 2), A133652 (least early bird number of order n). %K A133651 nonn,base %O A133651 1,1 %A A133651 _Klaus Brockhaus_, Sep 19 2007