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%I #4 Aug 24 2017 12:55:54
%S 21,18,15,18,21,6,7,8,9,10,11,6,13,7,15,8,17,6,19,10,7,11,21,6,21,13,
%T 9,7,21,6,21,8,11,17,7,6,21,18,13,8,21,6,21,11,9,18,21,6,7,10,15,13,
%U 21,6,11,7,15,18,21,6,21,18,7,8,13,6,21,17,15,7
%N The arithmetic function u(n,6,4).
%H 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 u[n_, m_, h_] := (d = Divisors[n]; Min[(h*Ceiling[m/d] - h + 1)*d]); Table[u[n, 6, 4], {n, 1, 70}]
%Y Cf. A289435, A289436, A289437, A289438, A289439, A289440, A289441.
%K nonn
%O 1,1
%A _Robert Price_, Aug 24 2017