login
A272318
Integer values of Lucas number A000032(n)/n.
1
1, 3, 321, 3572225067, 44308057022098435739157981016569
OFFSET
1,2
COMMENTS
The digital root of this sequence appears to be alternately 3 and 6, aside from the initial term of "1".
A subsequence of A181885. For instance, a(2)=A181885(6), a(3)=A181885(18), a(4)=A181885(54); a(5)=A181885(162); and, a(6)=A181885(486). Also 6, 18, 54, 162 and 486 are consecutive terms of the Pinot sequence A008776. Is this a coincidence?
LINKS
FORMULA
a(n) = A000032(A016089(n))/n. - Michel Marcus, Apr 25 2016
MATHEMATICA
LucasL[#]/# & /@ Range@ 1200 /. _Rational -> Nothing (* Version 10.2, or *)
Select[Array[LucasL[#]/# &, {1200}], IntegerQ] (* Michael De Vlieger, Apr 25 2016 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Peter M. Chema, Apr 25 2016
STATUS
approved