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 A000981 #12 Apr 01 2017 00:45:59 %S A000981 9,19,90,91,92,93,94,95,96,97,98,99,900,901,902,903,904,905,906,907, %T A000981 908,909,910,911,912,913,914,915,916,917,918,919,920,921,922,923,924, %U A000981 925,926,927,928,929,930 %N A000981 Numbers beginning with letter 'n' in English. %H A000981 John Cerkan, <a href="/A000981/b000981.txt">Table of n, a(n) for n = 1..10000</a> %t A000981 Select[Range[10^3], Function[d, Or[And[Mod[IntegerLength@ #, 3] == 2, FromDigits@ Take[d, 2] == 19], First@ d == 9]]@ IntegerDigits@ # &] (* _Michael De Vlieger_, Feb 13 2017 *) %Y A000981 Subsequence of A125299. %Y A000981 Cf. A000865, A000867, A000870, A000873, A006092. %K A000981 word,nonn %O A000981 1,1 %A A000981 _N. J. A. Sloane_ %E A000981 Edited by _John Cerkan_, Feb 13 2017