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A087724 a[n_]=-PrimePi[n]+Floor[Prime[n]/Log[n]]-2. 0
1, 0, 1, 1, 2, 2, 3, 4, 6, 5, 7, 7, 8, 9, 11, 11, 12, 12, 13, 13, 15, 15, 17, 19, 19, 20, 21, 20, 21, 23, 24, 26, 26, 28, 29, 29, 30, 31, 32, 33, 33, 34, 35, 35, 35, 37, 40, 41, 41, 42, 43, 42, 44, 46, 47, 48, 48, 48, 49, 48, 50, 54, 54, 54, 55, 57, 58, 60, 61, 60, 61, 62, 63, 64 (list; graph; refs; listen; history; internal format)
OFFSET

2,5

MATHEMATICA

Digits=200 a[n_]=-PrimePi[n]+Floor[Prime[n]/Log[n]]-2 b=Table[a[n], {n, 2, Digits}]

CROSSREFS

Sequence in context: A074077 A078381 A118975 * A152047 A101344 A152048

Adjacent sequences:  A087721 A087722 A087723 * A087725 A087726 A087727

KEYWORD

nonn

AUTHOR

Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Sep 29 2003

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Last modified February 17 08:21 EST 2012. Contains 205998 sequences.