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A061066 a(n)=(p^2-1)/8 where p(n) is n-th prime. 0
1, 3, 6, 15, 21, 36, 45, 66, 105, 120, 171, 210, 231, 276, 351, 435, 465, 561, 630, 666, 780, 861, 990, 1176, 1275, 1326, 1431, 1485, 1596, 2016, 2145, 2346, 2415, 2775, 2850, 3081, 3321, 3486, 3741, 4005, 4095, 4560, 4656, 4851, 4950, 5565, 6216, 6441 (list; graph; refs; listen; history; internal format)
OFFSET

2,2

MATHEMATICA

f[n_]:=(Prime[n]^2-1)/8; Array[f, 66, 2] [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Aug 06 2009]

CROSSREFS

Sequence in context: A095869 A069559 A117748 * A093799 A087359 A180322

Adjacent sequences:  A061063 A061064 A061065 * A061067 A061068 A061069

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), May 28 2001

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Last modified February 15 13:49 EST 2012. Contains 205810 sequences.