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A191409 Primes of the form n*(n-1)^n-(n-1)*n^(n-1)-1. 2
5, 131, 54869, 863585783, 174960197237646244878763893842845824429634127969 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(6) and a(7) have 427 and 1773 digits, respectively, and are thus too large to include.

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

a(1)=5 (=3*2^3-2*3^2-1), a(2)=131 (=4*3^4-3*4^3-1), a(3)=54869 (=6*5^6-5*6^5-1), a(4)=863585783 (=9*8^9-8*9^8-1).

MATHEMATICA

Select[Table[n(n-1)^n-(n-1)n^(n-1)-1, {n, 200}], PrimeQ] (* Harvey P. Dale, Jun 19 2011 *)

CROSSREFS

Cf. A191699 (associated n).

Sequence in context: A222880 A070247 A171375 * A003372 A187357 A135758

Adjacent sequences:  A191406 A191407 A191408 * A191410 A191411 A191412

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Jun 12 2011

STATUS

approved

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Last modified June 27 12:48 EDT 2022. Contains 354896 sequences. (Running on oeis4.)