A166472 2^F(n+2)*3^F(n+1)/12, where F(n) is the n-th Fibonacci number (A000045(n)).

1, 6, 72, 5184, 4478976, 278628139008, 14975624970497949696, 50071566192138943522512952098816, 8998235963747242817865410245394871488270255869919232

Offset

1,2

Comments

For m>1, A166469(A002110(m)*a(n))=F(m+n+1).

A166469(a(n))=F(n+3)-2=A001911(n).

Links

Table of n, a(n) for n=1..9.

Formula

a(n)=A166470(n+1)/12.

For n>1, a(n)=12*a(n-1)*a(n-2).

Mathematica

Table[(2^Fibonacci[n + 2] * 3^Fibonacci[n + 1])/12, {n, 1, 10}] (* G. C. Greubel, May 15 2016 *)
(3^#[[1]] 2^#[[2]])/12&/@Partition[Fibonacci[Range[2, 15]], 2, 1] (* Harvey P. Dale, Jul 12 2021 *)

Crossrefs

Subsequence of A003586, A025487.

Sequence in context: A279234 A132878 A006585 * A182917 A328814 A203433

Adjacent sequences: A166469 A166470 A166471 * A166473 A166474 A166475

Keyword

nonn

Author

Matthew Vandermast, Nov 05 2009

Status

approved