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A057022 floor[sum of factors of n / number of factors of n], i.e. [sigma(n)/d(n)]. +0
3
1, 1, 2, 2, 3, 3, 4, 3, 4, 4, 6, 4, 7, 6, 6, 6, 9, 6, 10, 7, 8, 9, 12, 7, 10, 10, 10, 9, 15, 9, 16, 10, 12, 13, 12, 10, 19, 15, 14, 11, 21, 12, 22, 14, 13, 18, 24, 12, 19, 15, 18, 16, 27, 15, 18, 15, 20, 22, 30, 14, 31, 24, 17, 18, 21, 18, 34, 21, 24, 18 (list; graph; listen)
OFFSET

1,3

FORMULA

a(n) =(A000203(n)-A054025(n))/A000005(n).

EXAMPLE

a(4)=2 since the 3 factors of 4 are 1, 2 and 4 and [(1+2+4)/3]=[7/3]=2.

CROSSREFS

Cf. A000005, A000203, A009205, A054025, A057020, A057021.

Sequence in context: A056239 A161511 A100197 this_sequence A087504 A067539 A166312

Adjacent sequences: A057019 A057020 A057021 this_sequence A057023 A057024 A057025

KEYWORD

nonn

AUTHOR

Henry Bottomley (se16(AT)btinternet.com), Jul 21 2000

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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