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 A078609 #5 Jun 24 2014 01:08:33 %S A078609 8,12,16,21,25,29,34,38,42,47,51,55,60,64,68,73,77,81,86,90,94,99,103, %T A078609 107,112,116,120,125,129,133,138,142,146,150,155,159,163,168,172,176, %U A078609 181,185,189,194,198,202,207,211,215,220,224,228,233,237,241,246,250 %N A078609 Least positive integer x such that 2*x^n>(x+3)^n. %F A078609 a(n) = ceiling(3/(2^(1/n)-1)). For most n, a(n) = floor(3n/log(2)-1/2), but there are exceptions, starting with n=32 and n=52113. %e A078609 a(2)=8 as 7^2=49, 8^2=64, 10^2=100 and 11^2=121. %o A078609 (PARI) for (n=2,50, x=2; while (2*x^n<=((x+3)^n),x++); print1(x",")) %Y A078609 Cf. A078607, A078608. %K A078609 nonn %O A078609 2,1 %A A078609 _Jon Perry_, Dec 09 2002 %E A078609 Edited by _Dean Hickerson_, Dec 17 2002