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A154731 Integers of the form k=n^3-n^2, such that k-+1 are primes. 2
4, 18, 180, 2028, 8820, 34848, 108288, 191748, 720900, 875520, 960498, 990000, 1355310, 1629108, 1713600, 1756920, 2334948, 2609028, 7376850, 8448048, 21639798, 37148148, 42023088, 48893940, 60544008, 63840000, 100328400 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..27.

MATHEMATICA

lst={}; Do[k=n^3-n^2; If[PrimeQ[k-1]&&PrimeQ[k+1], AppendTo[lst, p]], {n, 7!}]; lst

CROSSREFS

Cf. A111503

Sequence in context: A145075 A058924 A260970 * A201346 A174663 A197786

Adjacent sequences:  A154728 A154729 A154730 * A154732 A154733 A154734

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, Jan 14 2009

STATUS

approved

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Last modified August 19 04:18 EDT 2019. Contains 326109 sequences. (Running on oeis4.)