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A020934 Greatest k such that (k-th prime) < (4 times n-th prime). 8
4, 5, 8, 9, 14, 15, 19, 21, 24, 30, 30, 34, 38, 39, 42, 47, 51, 53, 56, 61, 61, 65, 67, 71, 76, 79, 80, 82, 84, 87, 96, 99, 101, 101, 108, 110, 114, 118, 121, 125, 127, 128, 135, 136, 138, 138, 146, 154, 155, 156, 158, 162, 162, 168, 172, 177, 180, 180, 185, 188 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Table[PrimePi[NextPrime[4Prime[n], -1]], {n, 60}] (* Harvey P. Dale, Jan 15 2012 *)
CROSSREFS
Sequence in context: A267489 A073320 A020668 * A094004 A228012 A067271
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Henry Bottomley, Nov 13 2000
STATUS
approved

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Last modified March 19 04:26 EDT 2024. Contains 370952 sequences. (Running on oeis4.)