a(n) = (2^(n-1))*(Integral_{x=0..1} (1+x^2)^n dx)/(Integral_{x=0..1} (1-x^2)^n dx).

A088854

a(n) = (2^(n-1))*(Integral_{x=0..1} (1+x^2)^n dx)/(Integral_{x=0..1} (1-x^2)^n dx).

Terms

    a(0) =2a(1) =7a(2) =24a(3) =83a(4) =292a(5) =1046a(6) =3808a(7) =14051a(8) =52412a(9) =197202a(10) =747120a(11) =2846318a(12) =10892936a(13) =41844172a(14) =161247104a(15) =623034403a(16) =2412871916a(17) =9363311482a(18) =36399254864a(19) =141721774138a(20) =552572485496

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