The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A191980 Ordered sums f+5g, where f and g are Lucas numbers (A000032 beginning at 1). 4
 6, 8, 9, 12, 16, 18, 19, 21, 22, 23, 24, 26, 27, 31, 33, 34, 36, 38, 39, 42, 44, 46, 49, 52, 53, 56, 58, 59, 62, 64, 66, 67, 73, 81, 82, 84, 91, 93, 94, 96, 97, 101, 102, 108, 111, 119, 128, 131, 137, 138, 143, 146, 148, 149, 152, 156, 158, 163, 166, 174 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS MATHEMATICA c = 1; d = 5; f[n_] := LucasL[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]]    (* A191980 *) 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]]  (*A 191981: 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]]  (* A191982: d*f(i)-c*f(j) *) v3 = Union[v1, v2]       (* A191983 *) With[{nn=20}, Select[Union[(#[[1]]+5#[[2]]&/@Tuples[LucasL[Range[nn]], 2])], #<=LucasL[nn]+5&]] (* Harvey P. Dale, Dec 07 2018 *) CROSSREFS Cf. A191981, A191981, A191982, A191983. Sequence in context: A337381 A305704 A043720 * A304412 A161982 A285275 Adjacent sequences:  A191977 A191978 A191979 * A191981 A191982 A191983 KEYWORD nonn AUTHOR Clark Kimberling, Jun 20 2011 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 6 13:24 EST 2021. Contains 349563 sequences. (Running on oeis4.)