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 A215259 #18 May 13 2013 01:54:22 %S A215259 0,0,1,2,2,4,4,6,7,8,8,10,10,13,13,13,13,16,16,19,19,19,19,22,22,24, %T A215259 24,25,25,28,28,32,33,33,33,33,33,36,36,36,36,40,40,44,44,44,44,48,48, %U A215259 49,49,49,49,53,53,53,53,53,53,58,58,62,62,62,62,62,62,67,67,67,67,71,71,75,75,75,75,75,75,79,79,81,81,85,85,85,85,85,85,89,89,89,89,89,89 %N A215259 Nearest integer to log(A003418(n)). %H A215259 Charles R Greathouse IV, <a href="/A215259/b215259.txt">Table of n, a(n) for n = 0..10000</a> %F A215259 a(n) ~ n, a statement equivalent to the Prime Number Theorem. - _Charles R Greathouse IV_, Sep 23 2012 %o A215259 (PARI) v=List([0]);t=1;for(n=1,100,listput(v,round(log(t=lcm(t,n))))); Vec(v) \\ _Charles R Greathouse IV_, Sep 23 2012 %Y A215259 Cf. A003418, A215260, A057872. %K A215259 nonn %O A215259 0,4 %A A215259 _N. J. A. Sloane_, Sep 14 2012