OFFSET
1,3
COMMENTS
Here sigma(n)=the sum of the divisors of n and the binary order of n: log_2(n) rounded up to next integer.
LINKS
J. Mulder, Table of n, a(n) for n = 1..350
FORMULA
a(n)=A029837(n)^sigma(n).
EXAMPLE
a(1)=0^1=0, a(2)=1^3=1, a(3)=2^4=16.
MATHEMATICA
Array[Ceiling[Log2[ # ]]^DivisorSigma[1, # ] &, 350] [From Jasper Mulder (jasper.mulder(AT)planet.nl), Jun 03 2010]
CROSSREFS
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Jul 26 2009
EXTENSIONS
Corrected (243 replaced by 729, 6708864 by 67108864) and extended by R. J. Mathar, May 21 2010
Definition corrected by Jasper Mulder (jasper.mulder(AT)planet.nl), Jun 03 2010
STATUS
approved