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Search: id:A054725
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A054725 a[1]=1; a[m]= sum[a[p-1]], where sum is over all primes (not necessarily distinct), p, that divide m. +0
2
1, 1, 1, 2, 2, 2, 2, 3, 2, 3, 3, 3, 3, 3, 3, 4, 4, 3, 3, 4, 3, 4, 4, 4, 4, 4, 3, 4, 4, 4, 4, 5, 4, 5, 4, 4, 4, 4, 4, 5, 5, 4, 4, 5, 4, 5, 5, 5, 4, 5, 5, 5, 5, 4, 5, 5, 4, 5, 5, 5, 5, 5, 4, 6, 5, 5, 5, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 4, 6, 6, 5, 6, 5, 5, 6, 6, 5, 5, 6, 5, 6, 5, 6, 6, 5, 5, 6, 6, 6, 6, 6 (list; graph; listen)
OFFSET

1,4

LINKS

Leroy Quet, Home Page (listed in lieu of email address)

EXAMPLE

a[20] = a[2-1] +a[2-1] +a[5-1] =1 + 1 +2 =4 because 20 = 2*2*5.

CROSSREFS

Sequence in context: A068211 A089050 A125173 this_sequence A064415 A086833 A010764

Adjacent sequences: A054722 A054723 A054724 this_sequence A054726 A054727 A054728

KEYWORD

nonn

AUTHOR

Leroy Quet Apr 20 2000

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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