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Denominators of rationals (in lowest terms) used in a certain high temperature expansion.
1

%I #5 Nov 28 2018 22:29:42

%S 1,6,16,32,384,256,4096,24576,32768,65536,1572864,1048576,4194304,

%T 25165824,268435456,536870912,2147483648,4294967296,34359738368,

%U 68719476736,274877906944,549755813888,8796093022208,17592186044416

%N Denominators of rationals (in lowest terms) used in a certain high temperature expansion.

%C The numerators and details are given in A099398.

%C a(n)=denominator(A(n)) with the rationals A(n) defined in A099398.

%H Isabel Cação, Helmuth R. Malonek, Maria Irene Falcão, Graça Tomaz, <a href="https://www.emis.de/journals/JIS/VOL21/Falcao/falcao2.html">Combinatorial Identities Associated with a Multidimensional Polynomial Sequence</a>, J. Int. Seq., Vol. 21 (2018), Article 18.7.4.

%e Rationals A(n), n>=0: 1/1 = 1, 1/6, 1/16, 1/32, 7/384, ...

%K nonn,frac,easy

%O 0,2

%A _Wolfdieter Lang_, Nov 10 2004