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A120154 a(1)=9; a(n)=floor((27+sum(a(1) to a(n-1)))/3). 0
9, 12, 16, 21, 28, 37, 50, 66, 88, 118, 157, 209, 279, 372, 496, 661, 882, 1176, 1568, 2090, 2787, 3716, 4955, 6606, 8808, 11744, 15659, 20879, 27838, 37118, 49490, 65987, 87983, 117310, 156414, 208552, 278069, 370759, 494345, 659127 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..40.

CROSSREFS

Cf. A073941, A112088, A072493.

Sequence in context: A019468 A084799 A166136 * A084375 A076674 A176062

Adjacent sequences:  A120151 A120152 A120153 * A120155 A120156 A120157

KEYWORD

nonn

AUTHOR

Graeme McRae, Jun 10 2006

STATUS

approved

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Last modified May 16 22:04 EDT 2021. Contains 343955 sequences. (Running on oeis4.)