This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A272318 #22 Dec 23 2019 18:56:59
%S A272318 1,3,321,3572225067,44308057022098435739157981016569
%N A272318 Integer values of Lucas number A000032(n)/n.
%C A272318 The digital root of this sequence appears to be alternately 3 and 6, aside from the initial term of "1".
%C A272318 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?
%H A272318 Andrew Howroyd, <a href="/A272318/b272318.txt">Table of n, a(n) for n = 1..9</a>
%F A272318 a(n) = A000032(A016089(n))/n. - _Michel Marcus_, Apr 25 2016
%t A272318 LucasL[#]/# & /@ Range@ 1200 /. _Rational -> Nothing (* Version 10.2, or *)
%t A272318 Select[Array[LucasL[#]/# &, {1200}], IntegerQ] (* _Michael De Vlieger_, Apr 25 2016 *)
%Y A272318 Cf. A000032, A008776, A016089, A167745, A181885, A167745 and A016089.
%K A272318 nonn
%O A272318 1,2
%A A272318 _Peter M. Chema_, Apr 25 2016