A166326 a(n) = prime(n)^(prime(n)+1) - (prime(n)+1)^prime(n).

-1, 17, 7849, 3667649, 2395420006033, 3143661612445145, 11877172892329028459041, 32347093457545958193355601, 424678439961073471604787362241217

Offset

1,2

Links

Table of n, a(n) for n=1..9.

Formula

a(n) = A104126(n) - A104127(n) = A007925(A000040(n)). - R. J. Mathar, Oct 14 2009

Example

a(1) = 2^3 - 3^2 = -1. a(2) = 3^4 - 4^3 = 17. a(3) = 5^6 - 6^5 = 7849.

Mathematica

Array[Prime[ # ]^(Prime[ # ]+1)-(Prime[ # ]+1)^Prime[ # ]&, 16]

Crossrefs

Cf. A000040, A007925, A140893, A104126, A104127.

Sequence in context: A198406 A198533 A192766 * A203678 A257044 A114924

Adjacent sequences: A166323 A166324 A166325 * A166327 A166328 A166329

Keyword

sign

Author

Vladimir Joseph Stephan Orlovsky, Oct 11 2009

Extensions

Keyword:sign set by R. J. Mathar, Oct 14 2009

Status

approved