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 A291369 #4 Aug 23 2017 16:06:50
%S A291369 15,15,3,4,5,3,7,4,3,5,11,3,13,7,3,4,15,3,15,4,3,11,15,3,5,13,3,4,15,
%T A291369 3,15,4,3,15,5,3,15,15,3,4,15,3,15,4,3,15,15,3,7,5,3,4,15,3,5,4,3,15,
%U A291369 15,3,15,15,3,4,5,3,15,4,3,5
%N A291369 The arithmetic function u(n,3,7).
%H A291369 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 A291369 u[n_, m_, h_] := (d = Divisors[n]; Min[(h*Ceiling[m/d] - h + 1)*d]); Table[u[n, 3, 7], {n, 1, 70}]
%Y A291369 Cf. A289435, A289436, A289437, A289438, A289439, A289440, A289441.
%K A291369 nonn
%O A291369 1,1
%A A291369 _Robert Price_, Aug 23 2017