34767720

Appears in sequences

• a(n) = binomial(2*n, n) mod binomial(2*n-2, n-1).at n=13A024483
• Expansion of e.g.f. Bessel_I(2,2x) + 2*Bessel_I(3,2x) + Bessel_I(4,2x).at n=27A116385
• a(n) = A003418(n)/A000793(n).at n=28A225558
• Oscillating orbitals over n sectors (nonpositive values indicating there exist none).at n=28A232500
• a(n) = (n-1)*Catalan(n).at n=14A276666