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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A016085 a(1) = 1; a(n+1) = floor((sum{k=1 to n} a(k)^3)^(1/3)). 0
1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 3, 3, 4, 5, 6, 7, 9, 11, 14, 17, 21, 27, 34, 42, 53, 67, 84, 106, 133, 167, 211, 265, 334, 421, 530, 668, 841, 1060, 1335, 1682, 2119, 2670, 3364, 4238, 5339, 6727, 8475, 10678, 13453, 16950, 21355, 26906, 33899, 42710, 53811 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,9
LINKS
EXAMPLE
a(10) = floor((1^3 + 1^3 + 1^3 + 1^3 + 1^3 + 1^3 + 1^3 + 1^3 + 2^3)^(1/3)) = floor(16^(1/3)) = 2.
MATHEMATICA
a[1] = 1; a[n_] := a[n] = Floor[ Sum[ a[k]^3, {k, 1, n - 1}]^(1/3)]; Table[ a[n], {n, 1, 56} ]
CROSSREFS
Sequence in context: A136421 A274159 A239905 * A018122 A074732 A089046
KEYWORD
easy,nonn
AUTHOR
_Leroy Quet_, Feb 15 2002
EXTENSIONS
Edited by _Robert G. Wilson v_, Feb 18 2002
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 29 23:21 EST 2024. Contains 370428 sequences. (Running on oeis4.)