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Search: id:A057335
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A057335 Essentially sequence A055932 generated using A000120, hence sorted by number of factors. +0
7
1, 2, 4, 6, 8, 12, 18, 30, 16, 24, 36, 60, 54, 90, 150, 210, 32, 48, 72, 120, 108, 180, 300, 420, 162, 270, 450, 630, 750, 1050, 1470, 2310, 64, 96, 144, 240, 216, 360, 600, 840, 324, 540, 900, 1260, 1500, 2100, 2940, 4620, 486, 810, 1350, 1890, 2250, 3150, 4410 (list; graph; listen)
OFFSET

0,2

COMMENT

Note that for n>0 the prime divisors of a(n) are consecutive primes starting with 2. All of the least prime signatures (A025487) are included; with the other values forming A056808.

FORMULA

a(n)= A057334(n) * a (repeated)

CROSSREFS

Cf. A057334, A055932 and A056808.

Adjacent sequences: A057332 A057333 A057334 this_sequence A057336 A057337 A057338

Sequence in context: A079212 A141452 A050597 this_sequence A126907 A118563 A140999

KEYWORD

easy,nonn

AUTHOR

Alford Arnold (Alford1940(AT)aol.com), Aug 27 2000

EXTENSIONS

More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 29 2003

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Last modified October 12 15:26 EDT 2008. Contains 144830 sequences.


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