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A120145 a(1)=20; a(n)=floor((41+sum(a(1) to a(n-1)))/2). 0
20, 30, 45, 68, 102, 153, 229, 344, 516, 774, 1161, 1741, 2612, 3918, 5877, 8815, 13223, 19834, 29751, 44627, 66940, 100410, 150615, 225923, 338884, 508326, 762489, 1143734, 1715601, 2573401, 3860102, 5790153, 8685229, 13027844 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..34.

CROSSREFS

Cf. A073941, A112088, A072493.

Sequence in context: A108030 A095787 A198471 * A104048 A078499 A066027

Adjacent sequences:  A120142 A120143 A120144 * A120146 A120147 A120148

KEYWORD

nonn

AUTHOR

Graeme McRae, Jun 10 2006

STATUS

approved

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Last modified September 19 15:09 EDT 2020. Contains 337178 sequences. (Running on oeis4.)