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 A182050 #9 Apr 10 2012 11:15:50
%S A182050 0,3,5,6,9,10,14,18,21,23,28,32,35,43,45,51,58,55,71,72,79,84,92,95,
%T A182050 107,117,116,119,146,134,159,156,162,178,189,196,202,214,217,240,238,
%U A182050 250,264,278,276,296,308,324,327,332,357,369,372,395,395,416,441,429,451,466,480,501
%N A182050 Number of odd primes between successive numbers of the form n*(n+1)^2/2.
%e A182050 There is no odd prime between 0 and 2. There are three odd primes between 2 and 9.
%t A182050 Join[{0}, Differences[PrimePi[Table[n (n + 1)^2/2, {n, 1, 62}]]]] (* _T. D. Noe_, Apr 09 2012 *)
%Y A182050 Cf. A006002.
%K A182050 nonn
%O A182050 1,2
%A A182050 _Gerasimov Sergey_, Apr 08 2012