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A166660 Totally multiplicative sequence with a(p) = 2p+1 for prime p. 1
1, 5, 7, 25, 11, 35, 15, 125, 49, 55, 23, 175, 27, 75, 77, 625, 35, 245, 39, 275, 105, 115, 47, 875, 121, 135, 343, 375, 59, 385, 63, 3125, 161, 175, 165, 1225, 75, 195, 189, 1375, 83, 525, 87, 575, 539, 235, 95, 4375, 225, 605 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

FORMULA

Multiplicative with a(p^e) = (2p+1)^e. If n = Product p(k)^e(k) then a(n) = Product (2*p(k)+1)^e(k).

CROSSREFS

Sequence in context: A173996 A024864 A025108 * A037374 A056717 A072370

Adjacent sequences:  A166657 A166658 A166659 * A166661 A166662 A166663

KEYWORD

nonn,mult

AUTHOR

Jaroslav Krizek (jaroslav.krizek(AT)atlas.cz), Oct 18 2009

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Last modified February 15 21:56 EST 2012. Contains 205860 sequences.