500231552

Appears in sequences

• Salié numbers: expansion of cosh x / cos x = Sum_{n >= 0} a(n)*x^(2n)/(2n)!.at n=7A000795
• Expansion of e.g.f. exp(x)/cos(x).at n=14A003701
• Boustrophedon transform of (n+1) mod 2.at n=14A062272