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A191850 Ordered sums f+4*g, where f and g are Fibonacci numbers (A000045). 5
5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17, 20, 21, 22, 23, 25, 28, 29, 33, 34, 35, 37, 38, 40, 41, 42, 45, 46, 53, 54, 55, 57, 59, 60, 63, 65, 66, 67, 73, 75, 85, 86, 87, 89, 92, 93, 97, 101, 105, 107, 109, 118, 121, 137, 138, 139, 141, 144, 148, 149, 152 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..62.

MATHEMATICA

c = 1; d = 4; 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 ]]    (* A191850 *)

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 ]]  (* A191851: f(i)-4*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 ]]  (* A191852: 4*f(i)-f(j) *)

v3 = Union[v1, v2]        (* A191853 *)

CROSSREFS

Cf. A191851, A191852, A191853.

Sequence in context: A268857 A205857 A196026 * A066263 A178096 A246782

Adjacent sequences:  A191847 A191848 A191849 * A191851 A191852 A191853

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jun 17 2011

STATUS

approved

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Last modified July 5 04:30 EDT 2020. Contains 335459 sequences. (Running on oeis4.)