318208

Appears in sequences

• Expansion of exp(tan(x)/cos(x)).at n=9A009253
• Expansion of e.g.f. sinh(tan(x)/cos(x)), odd powers only.at n=4A009612
• a(n) = 4*3*2*1 - 8*7*6*5 + 12*11*10*9 - 16*15*14*13 + ... - (up to the n-th term).at n=29A319887