A298871 Solution (a(n)) of the system of 3 complementary equations in Comments.
1, 4, 5, 7, 8, 9, 10, 12, 13, 14, 15, 17, 19, 20, 21, 22, 23, 24, 25, 28, 29, 30, 31, 32, 33, 34, 36, 37, 38, 39, 40, 41, 42, 44, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 58, 59, 61, 62, 63, 64, 65, 66, 67, 68, 69, 71, 72, 73, 74, 75, 76, 77, 78, 80, 81
Offset: 0
Examples
n: 0 1 2 3 4 5 6 7 8 9 a: 1 4 5 7 8 9 10 12 13 14 b: 2 6 11 18 26 35 45 57 70 84 c: 3 16 27 43 60 30 79 100 126 153
Links
- Clark Kimberling, Table of n, a(n) for n = 0..1000
Programs
-
Mathematica
z = 400; mex[list_, start_] := (NestWhile[# + 1 &, start, MemberQ[list, #] &]); a = {1}; b = {2}; c = {3}; Do[{AppendTo[a, mex[Flatten[{a, b, c}], 1]], AppendTo[b, mex[Flatten[{a, b, c}], Last[a] + Last[b]]], AppendTo[c, Last[a] + 2 Last[b]]}, {z}]; Take[a, 100] (* A298871 *) Take[b, 100] (* A298872 *) Take[c, 100] (* A298873 *)
Comments