814144

Appears in sequences

• Sinh(x) / cos(x) = Sum_{n>=0} a(n)*x^(2n+1)/(2n+1)!.at n=5A002084
• Expansion of e.g.f. exp(x)/cos(x).at n=11A003701
• Boustrophedon transform of n mod 2.at n=11A062161
• a(n) = Sum_{k=0..floor(n/3)} C(n-k,2*k) * 2^k * (-2)^(n-3*k).at n=16A099784
• Expansion of e.g.f. (1 + sinh(x)) / cos(x).at n=11A336024
• E.g.f. (exp(x) - 1)/cos(x).at n=10A380053