A157800 - OEIS

%I #18 May 10 2024 16:52:05

%S 1,6,18,27,810,243,10206,2187,65610,19683,1299078,177147,483611310,

%T 1594323,9565938,14348907,7317942570,129140163,103053850074,

%U 1162261467,383546284110,10460353203,1443528742014,94143178827,257010878197710

%N Denominator of Bernoulli(n, 1/3).

%H Vincenzo Librandi, <a href="/A157800/b157800.txt">Table of n, a(n) for n = 0..250</a>

%t Denominator[BernoulliB[Range[0,30],1/3]] (* _Harvey P. Dale_, Nov 17 2012 *)

%o (Python)

%o from sympy import bernoulli, Integer

%o def a(n): return bernoulli(n, 1/Integer(3)).denominator() # _Indranil Ghosh_, May 01 2017

%o (PARI) a(n) = my(x=1/3); denominator(eval(bernpol(n))); \\ _Ruud H.G. van Tol_, May 10 2024

%Y For numerators see A157799.

%K nonn,frac

%O 0,2

%A _N. J. A. Sloane_, Nov 08 2009