A189721 Partial sums of A189718.

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

Offset

1,3

Comments

See A189718.

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