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A145532 Number of numbers removed in each step of Eratosthenes' sieve for 5! 24
59, 19, 7, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Number of steps in Eratosthenes' sieve for n! is A133228(n).

Number of primes less than 5! is equal = 120-59-19-7-4-1 = 30 = A003604(5).

LINKS

Table of n, a(n) for n=1..4.

EXAMPLE

a(1)=59 because in first step we removed all numbers divisible by 2 (=60) with exception first one number 2.

a(2)=19 because number of numbers divisible by 3 and not divisible by 2 is 20 and we remove all with exception first one number 3.

CROSSREFS

A003604, A133228, A145532-A145540

Sequence in context: A088665 A198378 A159250 * A152214 A309434 A033379

Adjacent sequences:  A145529 A145530 A145531 * A145533 A145534 A145535

KEYWORD

fini,nonn,full

AUTHOR

Artur Jasinski, Oct 12 2008

STATUS

approved

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Last modified January 20 19:53 EST 2020. Contains 331096 sequences. (Running on oeis4.)