-1785

Appears in sequences

• Expansion of e.g.f. cosh(log(1+x))/cosh(x).at n=7A009131
• arcsinh(sin(x)+log(x+1)) = 2*x-1/2!*x^2-7/3!*x^3+18/4!*x^4+243/5!*x^5...at n=6A012893
• Expansion of e.g.f. arcsinh(arcsinh(x) + log(x+1)).at n=6A013075
• Matrix inverse of triangle A121335, where A121335(n,k) = C( n*(n+1)/2 + n-k + 1, n-k) for n>=k>=0.at n=15A121440
• Expansion of (1-x+x^3)/(1-x^2+2*x^3-x^4).at n=17A226447
• Values of n such that L(3) and N(3) are both prime, where L(k) = (n^2+n+1)*2^(2*k) + (2*n+1)*2^k + 1, N(k) = (n^2+n+1)*2^k + n.at n=43A226923
• Expansion of Product_{k>=1} 1/(1 + 3*x^k).at n=7A261582
• Square array A(n,k), n>=0, k>=0, read by antidiagonals, where column k is the expansion of Product_{j>=1} 1/(1 + k*x^j).at n=62A292133