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 A061402 #11 Jul 02 2018 01:41:21
%S A061402 0,1,3,4,6,8,9,11,13,14,16,18,19,21,23,24,26,28,29,31,32,34,36,37,39,
%T A061402 41,42,44,46,47,49,51,52,54,56,57,59,61,62,64,65,67,69,70,72,74,75,77,
%U A061402 79,80,82,84,85,87,89,90,92,93,95,97,98,100,102,103,105,107,108,110,112
%N A061402 a(n) = floor(n*sqrt(e)).
%H A061402 Harry J. Smith, <a href="/A061402/b061402.txt">Table of n, a(n) for n = 0..1000</a>
%o A061402 (PARI) { default(realprecision, 100); s=sqrt(exp(1)); for (n=0, 1000, write("b061402.txt", n, " ", floor(n*s)) ) } \\ _Harry J. Smith_, Jul 22 2009
%K A061402 nonn
%O A061402 0,3
%A A061402 _Jason Earls_, Jun 10 2001
%E A061402 More terms from _Harry J. Smith_, Jul 22 2009