A167446 a(n) = (Fibonacci(n)!!)!.

1, 1, 1, 2, 6, 1307674368000

Offset

0,4

Comments

Next term: 2.0205002129876...*10^827

Links

Table of n, a(n) for n=0..5.

Formula

a(n) = A000142(A006882(A000045(n))). - R. J. Mathar, Nov 12 2009

Maple

A000142 := proc(n) n! ; end proc ;
A006882 := proc(n) doublefactorial(n) ; end proc:
A000045 := proc(n) combinat[fibonacci](n) ; end proc:
A167446 := proc(n) A000142(A006882(A000045(n))) ; end proc: seq(A167446(n), n=0..5) ; # R. J. Mathar, Nov 12 2009

Mathematica

Array[Fibonacci[ # ]!!!&, 6]

Crossrefs

Sequence in context: A206034 A299376 A364750 * A100378 A020819 A390636

Adjacent sequences: A167443 A167444 A167445 * A167447 A167448 A167449

Keyword

nonn

Author

Vladimir Joseph Stephan Orlovsky, Nov 03 2009

Extensions

Parentheses in the definition added by R. J. Mathar, Nov 12 2009

Status

approved