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A127919 1/3 of product of three numbers: the n-th prime, the previous number and the following number. 8
2, 8, 40, 112, 440, 728, 1632, 2280, 4048, 8120, 9920, 16872, 22960, 26488, 34592, 49608, 68440, 75640, 100232, 119280, 129648, 164320, 190568, 234960, 304192, 343400, 364208, 408312, 431640, 480928, 682752, 749320, 857072, 895160, 1102600 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Number of irreducible monic cubic polynomials over GF(prime(n)). - Robert Israel, Jan 06 2015

LINKS

Table of n, a(n) for n=1..35.

MAPLE

seq((ithprime(n)^3 - ithprime(n))/3, n=1..100); # Robert Israel, Jan 06 2015

MATHEMATICA

Table[(Prime[n] + 1) Prime[n](Prime[n] - 1)/3, {n, 1, 100}]

PROG

(PARI) forprime(p=2, 1e3, print1(2*binomial(p+1, 3)", ")) \\ Charles R Greathouse IV, Jun 16 2011

(MAGMA) [(p^3 - p) div 3: p in PrimesUpTo(150)]; // Vincenzo Librandi, Jan 08 2015

CROSSREFS

Cf. A036689, A034953, A127917, A127918, A127920.

Sequence in context: A154132 A152458 A087971 * A074092 A003445 A181326

Adjacent sequences:  A127916 A127917 A127918 * A127920 A127921 A127922

KEYWORD

nonn,easy

AUTHOR

Artur Jasinski, Feb 06 2007

STATUS

approved

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Last modified March 28 12:08 EDT 2017. Contains 284186 sequences.