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 A163399 a(n)=(the binary order of n)^sigma(n) 1
 0, 1, 16, 128, 729, 531441, 6561, 14348907, 67108864, 68719476736, 16777216, 72057594037927936, 268435456, 281474976710656, 281474976710656, 4611686018427387904, 3814697265625, 1818989403545856475830078125 (list; graph; refs; listen; history; text; internal format)
 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 Cf. A000005, A029837. Sequence in context: A115977 A128692 A132136 * A067488 A308310 A120785 Adjacent sequences:  A163396 A163397 A163398 * A163400 A163401 A163402 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

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Last modified October 17 12:14 EDT 2019. Contains 328111 sequences. (Running on oeis4.)