A189721 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A189721

Partial sums of A189718.

4

0, 1, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 5, 6, 7, 7, 8, 9, 10, 10, 10, 10, 11, 12, 12, 13, 14, 15, 15, 15, 15, 16, 17, 17, 18, 19, 19, 20, 21, 22, 22, 22, 23, 23, 23, 23, 24, 25, 26, 26, 26, 27, 27, 27, 28, 28, 28, 28, 29, 30, 30, 31, 32, 32, 33, 34, 35, 35, 35, 36, 36, 36, 36, 37, 38, 39, 39, 39, 40, 40, 40

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,3

COMMENTS

LINKS

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

FORMULA

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

MATHEMATICA

(See A189718.)

CROSSREFS

Cf. A189718, A189719, A189720.

Sequence in context: A087842 A201206 A101776 * A202304 A047745 A196176

Adjacent sequences: A189718 A189719 A189720 * A189722 A189723 A189724

KEYWORD

nonn

AUTHOR

Clark Kimberling, Apr 26 2011

STATUS

approved