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A104723 Moebius transform of Jacobsthal numbers. 0
0, 1, 0, 2, 4, 10, 18, 42, 80, 168, 330, 682, 1340, 2730, 5418, 10910, 21760, 43690, 87192, 174762, 349180, 699006, 1397418, 2796202, 5590960, 11184800, 22366890, 44739072, 89473020, 178956970, 357902670, 715827882, 1431633920, 2863310846 (list; graph; refs; listen; history; internal format)
OFFSET

0,4

FORMULA

a(n)=sum mu(n/d)*A001045(d), d divides n; a(n+3)=3*A027375(n+3) (since the Moebius transform of (-1)^n is (-1, -1, 2, 0, 0, 0, ...)).

CROSSREFS

Sequence in context: A093695 A189892 A197049 * A206140 A079162 A197926

Adjacent sequences:  A104720 A104721 A104722 * A104724 A104725 A104726

KEYWORD

nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Mar 20 2005

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Last modified February 16 20:46 EST 2012. Contains 205964 sequences.