OFFSET
1,9
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
KEYWORD
easy,nonn
AUTHOR
Leroy Quet, Feb 15 2002
EXTENSIONS
Edited by Robert G. Wilson v, Feb 18 2002
STATUS
approved