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A062558 Number of nonisomorphic cyclic subgroups of dihedral group with 2n elements. 0
2, 2, 3, 3, 3, 4, 3, 4, 4, 4, 3, 6, 3, 4, 5, 5, 3, 6, 3, 6, 5, 4, 3, 8, 4, 4, 5, 6, 3, 8, 3, 6, 5, 4, 5, 9, 3, 4, 5, 8, 3, 8, 3, 6, 7, 4, 3, 10, 4, 6, 5, 6, 3, 8, 5, 8, 5, 4, 3, 12, 3, 4, 7, 7, 5, 8, 3, 6, 5, 8, 3, 12, 3, 4, 7, 6, 5, 8, 3, 10, 6, 4, 3, 12, 5, 4, 5, 8, 3, 12, 5, 6, 5, 4, 5, 12, 3, 6, 7, 9, 3 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

FORMULA

a(n)=tau(n)+(n mod 2), tau(n)=the number of divisors of n, cf. A000005.

CROSSREFS

Cf. A062249 (labeled case).

Sequence in context: A130971 A051776 A073734 * A072789 A126302 A200648

Adjacent sequences:  A062555 A062556 A062557 * A062559 A062560 A062561

KEYWORD

nonn

AUTHOR

Vladeta Jovovic (vladeta(AT)eunet.rs), Jul 03 2001

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Last modified February 17 23:08 EST 2012. Contains 206085 sequences.