A261457 a(n) = prime(n)! - n!.

1, 4, 114, 5016, 39916680, 6227020080, 355687428090960, 121645100408791680, 25852016738884976277120, 8841761993739701954543612371200, 8222838654177922817725562840083200, 13763753091226345046315979581580901920998400

Offset

1,2

Links

Table of n, a(n) for n=1..12.

Formula

a(n) = prime(n)! - n! = A039716(n) - A000142(n).

Example

The 3rd prime is 5, a(3)= 5! - 3! = 114.

Mathematica

Array[Prime[#]! - #! &, {12}] (* Michael De Vlieger, Aug 19 2015 *)

Prog

(Magma) [Factorial(NthPrime(n)) - Factorial(n): n in [1..15]]; // Vincenzo Librandi, Aug 20 2015
(PARI) first(m)=vector(m, i, prime(i)!-i!) \\ Anders Hellström, Aug 20 2015

Crossrefs

Cf. A000142, A014689, A039716.

Sequence in context: A260575 A275747 A239942 * A080482 A340277 A206689

Adjacent sequences: A261454 A261455 A261456 * A261458 A261459 A261460

Keyword

nonn,easy

Author

Altug Alkan, Aug 19 2015

Status

approved