A205955 - OEIS

A205955

a(n) = prime(n) * (prime(n+2) - prime(n+1)).

4, 6, 20, 14, 44, 26, 68, 114, 46, 174, 124, 74, 164, 258, 282, 106, 354, 244, 134, 426, 292, 474, 664, 356, 194, 404, 206, 428, 1526, 452, 762, 262, 1370, 278, 894, 906, 628, 978, 1002, 346, 1790, 362, 764, 386, 2364, 2388, 844, 446, 908, 1374, 466, 2390

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Michel Marcus, Table of n, a(n) for n = 1..1000

EXAMPLE

a(1) = prime(1)*(prime(3) - prime(2)) = 2*(5-3) = 4.

a(2) = prime(2)*(prime(4) - prime(3)) = 3*(7-5) = 6.

a(3) = prime(3)*(prime(5) - prime(4)) = 5*(11-7) = 20.

MAPLE

A205955:=n->ithprime(n)*(ithprime(n+2)-ithprime(n+1)): seq(A205955(n), n=1..100); # Wesley Ivan Hurt, May 02 2017

MATHEMATICA