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 A076961 #10 May 15 2014 10:28:33 %S A076961 2,4,81,64,9765625,0,33232930569601,262144,31381059609,0, %T A076961 17449402268886407318558803753801,0, %U A076961 361188648084531445929920877641340156544317601,0,0,4503599627370496 %N A076961 Smallest multiple of n with prime(n) divisors, or 0 if no such number exists. %C A076961 a(n) is zero if n is not a prime power. - _Franklin T. Adams-Watters_, May 14 2014 %Y A076961 Cf. A076962, A073904. %K A076961 nonn %O A076961 1,1 %A A076961 _Amarnath Murthy_, Oct 21 2002 %E A076961 More terms from _Sascha Kurz_, Jan 22 2003