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A145532 Number of numbers removed in each step of Eratosthenes's sieve for 5!. 24
59, 19, 7, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
The number of steps in Eratosthenes's sieve for n! is A133228(n).
The number of primes less than 5! is 120 - 59 - 19 - 7 - 4 - 1 = 30 = A003604(5).
LINKS
EXAMPLE
a(1)=59 because in first step we removed all numbers divisible by 2 (=60) with the exception of the first one, i.e., 2.
a(2)=19 because the number of numbers divisible by 3 and not divisible by 2 is 20 and we remove all with the exception of the first one, i.e., 3.
CROSSREFS
Sequence in context: A088665 A198378 A159250 * A152214 A033379 A122252
KEYWORD
fini,nonn,full
AUTHOR
Artur Jasinski, Oct 12 2008
STATUS
approved

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Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)