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 A281068 #15 Feb 19 2017 07:12:05 %S A281068 1,8,2,101,11,9,18,19,91,81,82,102,103,83,85,87,92,105,88,3,89,801, %T A281068 802,107,93,803,805,807,95,808,10,97,98,12,809,810,99,811,901,812,813, %U A281068 902,108,13,903,814,905,815,907,908,21,816,909,817,910,911,912,818,913,914,915,916,917,918,919 %N A281068 a(1) = 1. a(n) is the smallest natural number that is not already in the sequence such that the name of a(n) in English starts with the letter a(n-1) ends with, and a(n) makes the sequence extendable. %C A281068 "a(n) makes the sequence extendable" means the name of a(n) does not end with any of the letters r, x, y and d. %e A281068 If a(4) were 100 (one hundred, which ends with d), it would make the sequence finite. Therefore, a(4) has to be 101. %Y A281068 Cf. A277971, A277972, A281067. %K A281068 easy,nonn,word %O A281068 1,2 %A A281068 _Ivan N. Ianakiev_, Jan 14 2017