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 A291368 #4 Aug 23 2017 16:06:43
%S A291368 13,13,3,4,5,3,7,4,3,5,11,3,13,7,3,4,13,3,13,4,3,11,13,3,5,13,3,4,13,
%T A291368 3,13,4,3,13,5,3,13,13,3,4,13,3,13,4,3,13,13,3,7,5,3,4,13,3,5,4,3,13,
%U A291368 13,3,13,13,3,4,5,3,13,4,3,5
%N A291368 The arithmetic function u(n,3,6).
%H A291368 Bela Bajnok, <a href="https://arxiv.org/abs/1705.07444">Additive Combinatorics: A Menu of Research Problems</a>, arXiv:1705.07444 [math.NT], May 2017. See Table in Section 1.6.3.
%t A291368 u[n_, m_, h_] := (d = Divisors[n]; Min[(h*Ceiling[m/d] - h + 1)*d]); Table[u[n, 3, 6], {n, 1, 70}]
%Y A291368 Cf. A289435, A289436, A289437, A289438, A289439, A289440, A289441.
%K A291368 nonn
%O A291368 1,1
%A A291368 _Robert Price_, Aug 23 2017