A166471 2^L(n+1)*3^L(n), where L(n) is the n-th Lucas number (A000032(n)).

18, 24, 432, 10368, 4478976, 46438023168, 207994791256915968, 9658866935211987562213146624, 2008994011967745042140303999261186371230892032

Offset

0,1

Comments

For m>1, n>0, A166469(A002110(m)*(a(n)^k)/12) = k*L(m+n).

A166469(a(n))=L(n+2)+1=A001612(n+2).

Links

Table of n, a(n) for n=0..8.

Formula

For n>1, a(n)=a(n-1)*a(n-2).

Mathematica

Table[2^LucasL[n + 1] * 3^LucasL[n], {n, 0, 10}] (* G. C. Greubel, May 15 2016 *)

Crossrefs

Cf. A000032.

Subsequence of A003586. All terms but the first belong to A025487.

Sequence in context: A248102 A166646 A109144 * A072422 A003300 A245022

Adjacent sequences: A166468 A166469 A166470 * A166472 A166473 A166474

Keyword

nonn

Author

Matthew Vandermast, Nov 05 2009, Nov 07 2009

Status

approved