806453248

Appears in sequences

• Generalized tangent numbers d_(n,4).at n=7A000518
• Generalized tangent number d(8,n).at n=3A064073
• Main diagonal of A349271.at n=7A349263
• Generalized Euler numbers, a(n) = n!*[x^n](sec(8*x)*2*(sin(4*x) + cos(4*x))).at n=7A349267