A137149 a(n) = (prime(n)-2)!.

1, 1, 6, 120, 362880, 39916800, 1307674368000, 355687428096000, 51090942171709440000, 10888869450418352160768000000, 8841761993739701954543616000000

Offset

1,3

Comments

Old definition was "a(n) = prime(n)!/(prime(n)*EulerPhi(prime(n)))".

Degree of Lagrange resolvent of polynomial prime degree. Ratio: degree of symmetric group of prime order n divided by order metacyclic group of prime order n. For degree of Lagrange resolvent of polynomial not prime degree see A137150.

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..88

Mathematica

Table[(Prime[n]-2)!, {n, 1, 15}] (* Bruno Berselli, May 04 2014 *)

Prog

(Magma) [Factorial(NthPrime(n)-2): n in [1..15]]; // Vincenzo Librandi, May 04 2014

Crossrefs

Cf. A058161, A137150.

Sequence in context: A040996 A110442 A371206 * A317888 A053710 A336389

Adjacent sequences: A137146 A137147 A137148 * A137150 A137151 A137152

Keyword

nonn

Author

Artur Jasinski, Jan 23 2008

Extensions

New name from Vincenzo Librandi, May 04 2014

Status

approved