48649086

Appears in sequences

• Generalized class numbers c_(n,3).at n=8A000508
• Generalized Euler number c(9,n).at n=3A064070
• Generalized Euler numbers, a(n) = n!*[x^n](sec(9*x)*(4*sin(3*x) + 2)*cos(3*x)^2).at n=6A349268