A143857 a(n) = n + (n+1)*(n+2)^(n+3).

8, 163, 3074, 62503, 1399684, 34588811, 939524102, 27894275215, 900000000008, 31384283767219, 1176925259169802, 47248516628391479, 2022385242251558924, 91957716979980468763, 4427218577690292387854, 225009351233083599856159

Offset

0,1

Comments

Suggested by Karl Vago's contributions to Dario Alpern's list of records.

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..250

Dario A. Alpern, ECM Factorization applet records

Dario A. Alpern, Factorization using the Elliptic Curve Method

Formula

a(n) = n + A061250(n+3). - R. J. Mathar, Sep 04 2008

Example

a(1) = 1+(1+1)*(1+2)^(1+3) = 1+2*3^4 = 163.

Maple

A143857:=n->n+(n+1)*(n+2)^(n+3); seq(A143857(n), n=0..20); # Wesley Ivan Hurt, Mar 20 2014

Mathematica

Table[n + (n+1)*(n+2)^(n+3), {n, 0, 20}] (* Vincenzo Librandi, Mar 20 2014 *)

Prog

(Magma) [n+(n+1)*(n+2)^(n+3): n in [0..20]]; // Vincenzo Librandi, Dec 27 2010
(PARI) vector(21, n, (n-1) + n*(n+1)^(n+2)) \\ G. C. Greubel, Nov 09 2019
(Sage) [n + (n+1)*(n+2)^(n+3) for n in (0..20)] # G. C. Greubel, Nov 09 2019
(GAP) List([0..20], n-> n + (n+1)*(n+2)^(n+3)); # G. C. Greubel, Nov 09 2019

Crossrefs

Cf. A007778, A061250.

Sequence in context: A061711 A316998 A075387 * A025606 A224899 A281830

Adjacent sequences: A143854 A143855 A143856 * A143858 A143859 A143860

Keyword

nonn,easy

Author

Reinhard Zumkeller, Sep 03 2008

Status

approved