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A180086 Sum of previous terms divided by their distance from n 0
1, 3, 6, 11, 20, 33, 54, 87, 142, 226, 360, 571, 907, 1438, 2278, 3606, 5708, 9032, 14293, 22614, 35778, 56604, 89550, 141670, 224122, 354560, 560907, 887348, 1403768, 2220731, 3513149, 5557726, 8792197, 13909055, 22003808 (list; graph; refs; listen; history; text; internal format)
OFFSET
2,2
LINKS
FORMULA
a(n) = n + floor(a(n-1)/1) + floor(a(n-2)/2) + ... + floor(a(1)/(n-1))
EXAMPLE
a(1)=1 by definition
a(4)=4+a(3)/1+a(2)/2+a(1)/3=4+floor(6/1)+floor(3/2)+floor(1/3)=11
CROSSREFS
Sequence in context: A191696 A252479 A320850 * A116365 A297443 A185083
KEYWORD
nonn
AUTHOR
Dominick Cancilla, Aug 09 2010
STATUS
approved

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Last modified March 28 13:25 EDT 2024. Contains 371254 sequences. (Running on oeis4.)