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 A048241 #19 Mar 21 2019 02:39:05
%S A048241 1,4,7,14,23,41,56,89,119,164,206,281,335,437,518,626,734,902,1019,
%T A048241 1226,1382,1592,1787,2084,2288,2618,2888,3239,3545,4007,4307,4832,
%U A048241 5240,5750,6206,6818,7268,8006,8573,9281,9881,10781,11375,12362
%N A048241 Number of colors that can be mixed with n >= 0 units of yellow, blue, red.
%H A048241 T. D. Noe, <a href="/A048241/b048241.txt">Table of n, a(n) for n = 0..1000</a>
%F A048241 a(n) = number of triples (i, j, k) with 0 <= i+j+k <= n and gcd(i, j, k) = 1.
%F A048241 a(n) = A048134(n)+1. - _T. D. Noe_, Jan 16 2007
%e A048241 a(2)=7: white, primary and secondary colors (null, Y^1, B^1, R^1, Y^1*B^1, Y^1*R^1, B^1*R^1).
%t A048241 Accumulate[ Table[ Sum[ MoebiusMu[n/d]*(d+1)*(d+2)/2, {d, Divisors[n]}], {n, 0, 43}]] + 1 (* _Jean-François Alcover_, Oct 16 2013, after _T. D. Noe_ *)
%Y A048241 Cf. A048134, A048240.
%K A048241 nonn,easy,nice
%O A048241 0,2
%A A048241 _Jurjen N.E. Bos_, _N. J. A. Sloane_, Robin Trew (trew(AT)hcs.harvard.edu)