OFFSET
3,1
COMMENTS
From Lemma 2, p. 2, of Eminyan.
LINKS
K. M. Eminyan, Waring's problem in the natural numbers with binary expansions of a special type, arXiv:1202.1211v1 [math.NT], Feb 06 2012.
FORMULA
For 3 <= n <= 10 then 2^n; else if n > 10 then a(n) = 2*floor( n^2*(log(n) + log(log(n)) + 4) ).
EXAMPLE
a(11) = 2*floor( 11^2*(log(11) + log(log(11)) + 4) ) = 2*floor(879.970885...) = 2*879 = 1758.
CROSSREFS
KEYWORD
nonn,changed
AUTHOR
Jonathan Vos Post, Feb 07 2012
STATUS
approved