A066142 a(n) = (n!)^2 + n! + 1.

3, 3, 7, 43, 601, 14521, 519121, 25406641, 1625742721, 131682257281, 13168193068801, 1593350962156801, 229442533281561601, 38775788049859660801, 7600054456639175731201, 1710012252725507098368001, 437763136697415975333888001, 126513546505547525872644096001

Offset

0,1

Links

Harry J. Smith, Table of n, a(n) for n = 0..100

Mathematica

#^2+#+1&/@(Range[0, 20]!) (* Harvey P. Dale, Jul 15 2015 *)

Prog

(PARI) { for (n=0, 100, write("b066142.txt", n, " ", n!^2 + n! + 1) ) } \\ Harry J. Smith, Feb 02 2010

Crossrefs

Sequence in context: A363398 A232309 A273043 * A232459 A175566 A349425

Adjacent sequences: A066139 A066140 A066141 * A066143 A066144 A066145

Keyword

easy,nonn

Author

George E. Antoniou, Dec 07 2001

Extensions

More terms from Reiner Martin, Dec 26 2001

Status

approved