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 A291430 #4 Aug 23 2017 23:41:11
%S A291430 9,9,9,9,5,6,7,8,9,5,9,6,9,7,5,8,9,6,9,5,7,9,9,6,5,9,9,7,9,5,9,8,9,9,
%T A291430 5,6,9,9,9,5,9,6,9,9,5,9,9,6,7,5,9,9,9,6,5,7,9,9,9,5,9,9,7,8,5,6,9,9,
%U A291430 9,5
%N A291430 The arithmetic function u(n,5,2).
%H A291430 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 A291430 u[n_, m_, h_] := (d = Divisors[n]; Min[(h*Ceiling[m/d] - h + 1)*d]); Table[u[n, 5, 2], {n, 1, 70}]
%Y A291430 Cf. A289435, A289436, A289437, A289438, A289439, A289440, A289441.
%K A291430 nonn
%O A291430 1,1
%A A291430 _Robert Price_, Aug 23 2017