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A189641 Partial sums of A189640. 3
0, 0, 1, 1, 1, 2, 3, 3, 4, 4, 4, 5, 5, 5, 6, 7, 7, 8, 9, 9, 10, 10, 10, 11, 12, 12, 13, 13, 13, 14, 14, 14, 15, 16, 16, 17, 17, 17, 18, 18, 18, 19, 20, 20, 21, 22, 22, 23, 23, 23, 24, 25, 25, 26, 27, 27, 28, 28, 28, 29, 30, 30, 31, 31, 31, 32, 32, 32, 33, 34, 34, 35, 36, 36, 37, 37, 37, 38, 39, 39, 40 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

COMMENTS

See A189640.

LINKS

Table of n, a(n) for n=1..81.

FORMULA

s(n)=s([(n+2)/3])+[n/3], where s(1)=0.

MATHEMATICA

(See A189640.)

CROSSREFS

Cf. A189640.

Sequence in context: A046693 A196376 A156077 * A189672 A058889 A226143

Adjacent sequences:  A189638 A189639 A189640 * A189642 A189643 A189644

KEYWORD

nonn

AUTHOR

Clark Kimberling, Apr 24 2011

STATUS

approved

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Last modified November 20 10:09 EST 2019. Contains 329334 sequences. (Running on oeis4.)