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A101555 Convolution of A010060 and A000244. 0
0, 1, 4, 12, 37, 111, 333, 1000, 3001, 9003, 27009, 81028, 243084, 729253, 2187760, 6563280, 19689841, 59069523, 177208569, 531625708, 1594877124, 4784631373, 14353894120, 43061682360, 129185047080, 387555141241, 1162665423724 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

COMMENTS

A Thue-Morse convolution.

FORMULA

a(n)=sum{k=0..n, A010060(n-k)3^k}.

CROSSREFS

Sequence in context: A164853 A076124 A183923 * A033130 A196918 A099098

Adjacent sequences:  A101552 A101553 A101554 * A101556 A101557 A101558

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Dec 06 2004

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Last modified February 16 11:30 EST 2012. Contains 205907 sequences.