A117394 Product of the first F(n) primes, where F(n) is the n-th Fibonacci number.

1, 2, 2, 6, 30, 2310, 9699690, 304250263527210, 40729680599249024150621323470, 10014646650599190067509233131649940057366334653200433090, 16516447045902521732188973253623425320896207954043566485360902980990824644545340710198976591011245999110

Offset

0,2

Comments

Next term has 191 digits. - Emeric Deutsch, Apr 30 2006

Links

Alois P. Heinz, Table of n, a(n) for n = 0..13

Formula

a(n) = A002110(A000045(n)). - Alois P. Heinz, Apr 02 2021

Example

a(4)=30 because the 4th Fibonacci number is 3 and the product of the first 3 primes is 2*3*5=30.

Maple

with(combinat): a:=n->mul(ithprime(i), i=1..fibonacci(n)): seq(a(n), n=0..10); # Emeric Deutsch, Apr 30 2006

Mathematica

Table[Times@@Prime[Range[Fibonacci[n]]], {n, 10}] (* Harvey P. Dale, May 03 2018 *)

Crossrefs

Cf. A000045, A002110.

Sequence in context: A164347 A052584 A094303 * A267073 A003308 A180069

Adjacent sequences: A117391 A117392 A117393 * A117395 A117396 A117397

Keyword

easy,nonn

Author

Giovanni Teofilatto, Apr 25 2006

Extensions

More terms from Emeric Deutsch, Apr 30 2006

a(0)=1 prepended by Alois P. Heinz, Apr 02 2021

Status

approved