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 A076944 #4 Dec 05 2013 19:55:47
%S A076944 2,9,64,81,7776,15625,2097152,6561,262144,3486784401,743008370688,
%T A076944 244140625,793714773254144,3937376385699289,1152921504606846976,
%U A076944 43046721,2185911559738696531968,3814697265625
%N A076944 Least number such that n*k+1 is an n-th power.
%C A076944 a(n) <= {(n+1)^n - 1}/n.
%F A076944 a(n) = n*A076943(n) + 1.
%t A076944 Do[k = 2; While[ !IntegerQ[(k^n - 1)/n], k++ ]; Print[k^n], {n, 1, 19}]
%Y A076944 Cf. A076942, A076943, A074792.
%K A076944 nonn
%O A076944 1,1
%A A076944 _Amarnath Murthy_, Oct 19 2002
%E A076944 Edited, corrected and extended by _Robert G. Wilson v_, Oct 21 2002