4245504

Appears in sequences

• Expansion of e.g.f.: tan(x)*(1+x).at n=12A009725
• Expansion of e.g.f. tan(x)*x (even powers only).at n=6A009752
• Expansion of e.g.f. x * (tan(x) + sec(x)).at n=11A065619
• Triangle read by rows, T(n,k) = 2^(n-k)*[x^k] Euler_polynomial(n, x), for n >= 0, k >= 0.at n=79A081733
• Number of permutations of 1..n arranged in a circle with exactly 6 local maxima.at n=12A159714
• Triangle read by rows: k-th "a-number" of star graph K_{1,n-1}.at n=55A220901