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A175214 a(n)= a(r)+a(s) ; (r+s)<=n ; r=floor(sqrt(n)) ; s=floor(sqrt(n-1)). 0
1, 2, 2, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(1)=1, a(2)=a(1)+a(1)=2, a(3)=a(1)+a(1)=2, a(4)=a(2)+a(1)=3, a(5)=a(2)+a(2)=4, a(6)=a(2)+a(2)=4, a(7)=a(2)+a(2)=4, a(8)=a(2)+a(2)=4, a(9)=a(3)+a(2)=4, a(10)=a(3)+a(3)=4, a(11)=a(3)+a(3)=4, ...

LINKS

Table of n, a(n) for n=1..49.

CROSSREFS

Sequence in context: A065167 A332298 A300404 * A095395 A029134 A303997

Adjacent sequences:  A175211 A175212 A175213 * A175215 A175216 A175217

KEYWORD

easy,nonn

AUTHOR

Ctibor O. Zizka, Mar 06 2010

STATUS

approved

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Last modified June 12 18:38 EDT 2021. Contains 344959 sequences. (Running on oeis4.)