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 A193106 #19 Oct 12 2017 10:53:15 %S A193106 1,1,2,3,4,5,1,2,3,4,5,6,2,3,4,1,2,3,3,4,5,2,3,4,4,5,6,3,4,1,2,3,4,4, %T A193106 5,2,3,4,5,5,6,3,4,5,2,3,4,4,5,1,2,3,4,5,6,2,3,4,2,3,4,3,4,5,2,3,4,4, %U A193106 5,6,3,4,5,3,4,5,1,2,2,3,4,5,2,3,3,4,5,3,3,4,4,2,3,3,4,5,5,3,2,3,4,5,4,4,3,2,3,3,4,5,4,1,2,3,4,5,4,2,3,4,3 %N A193106 Minimal number of terms of A005826 needed to sum to n. %C A193106 Watson showed that a(n) <= 8 for all n. %C A193106 It is likely that a(n) <= 6 for all n (see A193107). %H A193106 H. E. Salzer and N. Levine, <a href="https://doi.org/10.1090/S0025-5718-1968-0224578-6">Proof that every integer <= 452,479,659 is a sum of five numbers of the form Q_x = (x^3+5x)/6, x>= 0</a>, Math. Comp., (1968), 191-192. %H A193106 G. L. Watson, <a href="https://doi.org/10.1112/jlms/s1-27.2.217">Sums of eight values of a cubic polynomial</a>, J. London Math. Soc., 27 (1952), 217-224. %p A193106 t1:=[seq((n^3-7*n)/6, n=3..20)]; %p A193106 LAGRANGE(t1, 8 120); # the LAGRANGE transform of a sequence is defined in A193101 - _N. J. A. Sloane_, Jul 15 2011 %Y A193106 Cf. A005826, A193107. %K A193106 nonn %O A193106 1,3 %A A193106 _N. J. A. Sloane_, Jul 15 2011