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A180224 Let a(1) = 1 and let S(1) = 1. Define S(n+1) = 1/(a(n)+1)+1/(a(n)+2)+...+1/k. Then a(n+1) is the least k such that S(n+1)>1. 0
1, 4, 12, 34, 94, 257, 700, 1904, 5177, 14074, 38258, 103997, 282695, 768446, 2088854, 5678095, 15434664, 41955768, 114047603 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..19.

EXAMPLE

a(1)=1 , 2=a(1)+1 , 3=a(1)+2 ....... 1/2=0.5 , 1/2+1/3=0.833 , 1/2+1/3+1/4=1.083 > 1 so a(2)=4

CROSSREFS

Sequence in context: A307305 A176753 A248873 * A293005 A173412 A079818

Adjacent sequences:  A180221 A180222 A180223 * A180225 A180226 A180227

KEYWORD

nonn,more

AUTHOR

Pierre CAMI, Aug 16 2010

STATUS

approved

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Last modified November 17 10:37 EST 2019. Contains 329225 sequences. (Running on oeis4.)