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A034733 Dirichlet convolution of b_n=2^(n-1) with itself. 1
1, 4, 8, 20, 32, 80, 128, 288, 528, 1088, 2048, 4288, 8192, 16640, 32896, 66112, 131072, 263424, 524288, 1050880, 2097664, 4198400, 8388608, 16786944, 33554688, 67125248, 134219776, 268469248, 536870912, 1073812480, 2147483648 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..31.

FORMULA

G.f.: Sum_{k>0} 2^(k-1)*x^k/(1-2*x^k). - Vladeta Jovovic, Jun 24 2003

CROSSREFS

Sequence in context: A084922 A180794 A047185 * A152233 A301896 A053303

Adjacent sequences:  A034730 A034731 A034732 * A034734 A034735 A034736

KEYWORD

nonn

AUTHOR

Erich Friedman

STATUS

approved

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Last modified April 26 12:20 EDT 2019. Contains 322472 sequences. (Running on oeis4.)