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 A291431 #4 Aug 23 2017 23:41:18
%S A291431 13,13,12,13,5,6,7,8,9,5,11,6,13,7,5,8,13,6,13,5,7,11,13,6,5,13,9,7,
%T A291431 13,5,13,8,11,13,5,6,13,13,12,5,13,6,13,11,5,13,13,6,7,5,12,13,13,6,5,
%U A291431 7,12,13,13,5,13,13,7,8,5,6,13,13,12,5
%N A291431 The arithmetic function u(n,5,3).
%H A291431 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 A291431 u[n_, m_, h_] := (d = Divisors[n]; Min[(h*Ceiling[m/d] - h + 1)*d]); Table[u[n, 5, 3], {n, 1, 70}]
%Y A291431 Cf. A289435, A289436, A289437, A289438, A289439, A289440, A289441.
%K A291431 nonn
%O A291431 1,1
%A A291431 _Robert Price_, Aug 23 2017