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 A077132 #14 Dec 05 2013 19:55:48 %S A077132 2,3,5,7,13,19,31,53,73,89,359,139,401,181,113,211,293,661,863,773, %T A077132 523,1933,1831,1069,1381,887,1637,1129,1669,1951,4027,3469,4177,6397, %U A077132 2477,2971,5531,1327,4297,4831,5351,5591,9973,11743,13187,8467,27851,18803,39047 %N A077132 Duplicate of A075580. %e A077132 a(0) = 2, a(3) = 7 as the product 8*9*10 has three prime divisors 2, 3 and 5. %K A077132 dead %O A077132 0,1 %A A077132 _Amarnath Murthy_, Oct 29 2002 %E A077132 More terms from _Donovan Johnson_, Sep 09 2008