-36581523

Appears in sequences

• Expansion of e.g.f. exp(x)/cosh(2*x).at n=10A188458
• Expansion of e.g.f.: exp(-x) / cosh(2*x).at n=10A212435
• a(n) = 4^n*Euler(n, 1/4)*2^(valuation_{2}(n + 1)).at n=10A339058