The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A273803 Numbers that are a product of distinct Fibonacci numbers (A160009) and also a product of distinct Lucas numbers (A274280). 1
 1, 3, 21, 126, 504, 987, 5922, 23688, 2178309, 13069854, 52279416, 10610209857723, 63661259146338, 254645036585352 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Is every term greater than 3 divisible by 21? LINKS Table of n, a(n) for n=1..14. EXAMPLE 126 = 2*3*21 = 7*18. MATHEMATICA s = {1}; z = 70; f = Fibonacci[2 + Range[z]]; Do[s = Union[s, Select[s*f[[i]], # <= f[[z]] &]], {i, z}]; s = Prepend[s, 0]; (* A160009 *) g = LucasL[Range[z]]; t = {1}; Do[t = Union[t, Select[t*g[[i]], # <= g[[z]] &]], {i, z}]; Intersection[s, t] CROSSREFS Cf. A000204, A000045, A160009, A274280, A274371. Sequence in context: A034552 A356889 A220616 * A036754 A121447 A125682 Adjacent sequences: A273800 A273801 A273802 * A273804 A273805 A273806 KEYWORD nonn,more AUTHOR Clark Kimberling, Jun 19 2016 STATUS approved

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

Last modified September 29 16:44 EDT 2023. Contains 365773 sequences. (Running on oeis4.)