

A191887


Ordered sums 3*f+5*g, where f and g are Fibonacci numbers (A000045).


5



8, 11, 13, 14, 16, 18, 19, 20, 21, 24, 25, 28, 29, 30, 31, 34, 39, 40, 43, 44, 46, 49, 54, 55, 64, 68, 71, 73, 74, 78, 79, 80, 88, 89, 103, 104, 107, 108, 111, 112, 114, 117, 120, 127, 128, 129, 142, 144, 167, 168, 170, 173, 175, 176, 179, 180, 185, 190, 194
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OFFSET

1,1


LINKS



MATHEMATICA

c = 3; d = 5; f[n_] := Fibonacci[n];
g[n_] := c*f[n]; h[n_] := d*f[n];
t[i_, j_] := h[i] + g[j];
u = Table[t[i, j], {i, 1, 20}, {j, 1, 20}];
v = Union[Flatten[u ]] (* A191887 *)
t1[i_, j_] := If[g[i]  h[j] > 0, g[i]  h[j], 0]
u1 = Table[t1[i, j], {i, 1, 20}, {j, 1, 20}];
v1 = Union[Flatten[u1 ]] (* A191888: c*f(i)d*f(j) *)
g1[n_] := d*f[n]; h1[n_] := c*f[n];
t2[i_, j_] := If[g1[i]  h1[j] > 0, g1[i]  h1[j], 0]
u2 = Table[t2[i, j], {i, 1, 20}, {j, 1, 20}];
v2 = Union[Flatten[u2 ]] (* A191889: d*f(i)c*f(j) *)


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



