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A049605 Smallest k>1 such that k divides sigma(k*n). +0
1
6, 3, 2, 6, 2, 2, 2, 3, 6, 2, 2, 2, 2, 2, 2, 6, 2, 3, 2, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 6, 2, 2, 2, 2, 2 (list; graph; listen)
OFFSET

1,1

COMMENT

a(n) = 2, 3 or 6. For any m, a(A028983(m)) = 2. If a(m)=6 then m is a square but if m is a square a(m) is not necessary 6, first example is 7 : a(7^2)=3.

CROSSREFS

Sequence in context: A083946 A010494 A078333 this_sequence A088395 A076214 A011488

Adjacent sequences: A049602 A049603 A049604 this_sequence A049606 A049607 A049608

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Jul 26 2002

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.


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