-5880

Appears in sequences

• arcsinh(cos(x)*arctan(x))=x-6/3!*x^3+108/5!*x^5-5880/7!*x^7...at n=3A012503
• Product_{k>=1}(1 + x^k)^a(k) = 1 + 3x.at n=9A038068
• Signed double Pochhammer triangle: expansion of x(x-2)(x-4)..(x-2n+2).at n=24A039683
• Triangle read by rows: Coefficients of characteristic polynomials of lower triangular matrix of Catalan numbers.at n=19A101413
• Lower triangular array T(n,k) generator for group of arrays related to A001147 and A102625.at n=39A132382
• Irregular triangle read by rows: coefficients of polynomials related to a family of convolutions of certain central binomial sequences.at n=30A142961
• a(n) = -(n - 4)*(n - 5)*(n - 12)/6.at n=34A167541
• Triangle read by rows: row n is the expansion of x^n in terms of (x+k)!/x! for decreasing k.at n=48A213735
• Triangle read by rows: T(n,k) = n!*S(n,k), where S(n,k) is the matrix inverse of the triangle zeta(k-n,1) - zeta(k-n,k+1), n>=1, k>=1.at n=33A214435
• Expansion of e.g.f. 1 / (1 - x + x^2/2 - x^3/3 + x^4/4).at n=8A371621