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 A176146 #6 Jul 12 2012 00:39:51 %S A176146 0,0,0,1,1,1,2,2,2,2,3,3,3,3,3,4,4,5,5,5,5,6,6,6,7,7,8,8,8,8,9,9,9,9, %T A176146 10,11,11,11,11,12,12,12,12,13,13,14,14,14,14,14,15,15,15,16,16,16,17, %U A176146 17,18,18,18,19,20,20,20,20,20,20,21,21,21,21,21,21,22,22,23,23,24,24,25 %N A176146 a(n) = n-th-semiprime without last digit. %C A176146 Sequence A131109 shows that a(n+1)-a(n) can be larger than 1. [From _T. D. Noe_, Apr 12 2010] %C A176146 The differences exceed 1 for the first time between a(186) = 59 and a(187) = 61. [_R. J. Mathar_, Apr 12 2010] %Y A176146 Cf. A176044, A001358, A106146. %K A176146 base,easy,nonn %O A176146 1,7 %A A176146 _Giovanni Teofilatto_, Apr 10 2010