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A075440 Numerator of 1/pp(n) - 1/pp(n+1), where pp(n) = n-th prime power. 0
3, 1, 1, 7, 9, 2, 5, 1, 13, 15, 17, 19, 21, 4, 3, 1, 25, 27, 5, 1, 2, 13, 33, 35, 19, 18, 39, 41, 43, 7, 17, 47, 49, 51, 53, 55, 57, 59, 61, 39, 3, 65, 67, 69, 71, 35, 38, 75, 77, 79, 81, 47, 1, 85, 87, 89, 23, 17, 71, 10, 12, 95, 97, 99, 101, 103, 5, 65, 107, 109, 4, 11, 113, 115 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..74.

EXAMPLE

a(2) = 1 because 1/pp(3) - 1/pp(2) = 1/4 - 1/8 =1/2.

CROSSREFS

Sequence in context: A176791 A259471 A220555 * A137470 A112492 A210574

Adjacent sequences:  A075437 A075438 A075439 * A075441 A075442 A075443

KEYWORD

easy,nonn,frac

AUTHOR

Zak Seidov, Oct 11 2002

STATUS

approved

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Last modified June 19 00:55 EDT 2019. Contains 324217 sequences. (Running on oeis4.)