-1192

Appears in sequences

• Expansion of log(1+tan(tan(x))).at n=6A009366
• Shifts left under inverse Euler transform.at n=30A038071
• a(n) = [x^n] (6 / Sum_{k=0..n} (k+3)!*x^k)^(1/2).at n=5A303671
• Expansion of Product_{k>=0} 1/(1 + 2*x^(2^k)).at n=11A308986
• G.f. A(x,y) satisfies: Sum_{n=-oo...+oo} (x^n + y)^n = exp( (1-y) * A(x,y) ) / (1-y), where A(x,y) = Sum_{n>=1} x^n/n * Sum{k=0..n-1} T(n,k)*y^k, written here as a flattened triangle of coefficients T(n,k) read by rows.at n=17A321600