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 A082252 #5 Nov 09 2019 12:47:52
%S A082252 41,152,263,33704,43805,53906,64007,74108,84209,94310,104411,114512,
%T A082252 124613,134714,144815,154916,165017,175118,185219,195320,205421,
%U A082252 215522,225623,235724,245825,255926,266027,276128,286229,296330,306431,316532,326633,33367034
%N A082252 Concatenation of (3n-2), (3n-1) and 3n divided by 3.
%H A082252 Andrew Howroyd, <a href="/A082252/b082252.txt">Table of n, a(n) for n = 1..1000</a>
%e A082252 a(5) = 131415/3 = 43805.
%o A082252 (PARI) a(n)={fromdigits(concat([digits(3*n-2), digits(3*n-1), digits(3*n)]))/3} \\ _Andrew Howroyd_, Nov 09 2019
%Y A082252 Cf. A082251, A082253, A082254, A082255, A082256.
%K A082252 base,easy,nonn
%O A082252 1,1
%A A082252 _Amarnath Murthy_, Apr 11 2003
%E A082252 Terms a(12) and beyond from _Andrew Howroyd_, Nov 09 2019