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 A035000 #5 Mar 31 2012 13:22:16 %S A035000 1,3,6,7,10,15,16,19,21,28,30,36,45,50,51,55,66,77,78,90,91,105,112, %T A035000 120,126,136,141,153,156,161,171,190,210,231,253,266,275,276,300,325, %U A035000 351,352,357,378,393,406,414,435,442,465,496,504,528,546,561,595,615 %N A035000 Nontrivial trinomial coefficients. %D A035000 L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 78. %Y A035000 Cf. A027907. %K A035000 nonn %O A035000 0,2 %A A035000 _Erich Friedman_