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A191883 Ordered sums 2*f+5*g, where f and g are Fibonacci numbers (A000045). 6
7, 9, 11, 12, 14, 15, 16, 17, 19, 20, 21, 25, 26, 27, 29, 31, 35, 36, 41, 42, 44, 46, 47, 50, 51, 52, 56, 57, 66, 67, 69, 71, 73, 75, 78, 81, 82, 83, 91, 93, 107, 108, 109, 111, 115, 120, 121, 125, 131, 133, 135, 147, 150, 172, 173, 174, 175, 176, 180, 183 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..5000

MATHEMATICA

c = 2; 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 ]]    (* A191883 *)

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 ]]  (* A191884: 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 ]]  (* A191885: d*f(i)-c*f(j) *)

v3 = Union[v1, v2]        (* A191886*)

CROSSREFS

Cf. A191884, A191885, A191886, A191879.

Sequence in context: A176326 A283056 A162308 * A108815 A262536 A161992

Adjacent sequences:  A191880 A191881 A191882 * A191884 A191885 A191886

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jun 18 2011

STATUS

approved

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Last modified December 10 23:17 EST 2019. Contains 329909 sequences. (Running on oeis4.)