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A084922 (prime(n)-1)*(prime(n)+1)/6. 2
4, 8, 20, 28, 48, 60, 88, 140, 160, 228, 280, 308, 368, 468, 580, 620, 748, 840, 888, 1040, 1148, 1320, 1568, 1700, 1768, 1908, 1980, 2128, 2688, 2860, 3128, 3220, 3700, 3800, 4108, 4428, 4648, 4988, 5340, 5460, 6080, 6208, 6468, 6600, 7420 (list; graph; refs; listen; history; internal format)
OFFSET

3,1

COMMENTS

a(n)=A084920(n)/6, a(n)=A084921(n)/3.

CROSSREFS

Cf. A000040, A006093, A008864.

Sequence in context: A160726 A191483 A062717 * A180794 A047185 A034733

Adjacent sequences:  A084919 A084920 A084921 * A084923 A084924 A084925

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jun 11 2003

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Last modified February 15 21:45 EST 2012. Contains 205860 sequences.