53856

Appears in sequences

• Expansion of e.g.f. tan(arctanh(x) * log(x+1)).at n=8A012700
• arctanh(arctanh(x)*log(x+1))=2/2!*x^2-3/3!*x^3+16/4!*x^4-50/5!*x^5...at n=8A012705
• G.f.: (x+4*x^3+x^5)/((1-x)^2*(1-x^2)^2*(1-x^3)^2).at n=30A083708
• Coefficients of 1/sqrt(1-12*x+4*x^2); also, a(n) is the central coefficient of (1+6*x+8*x^2)^n.at n=5A084773
• Triangle, read by rows, of coefficients in powers of e.g.f. for A100065 such that, for each row n>=0, Sum_{k=0..n} T(n,k)/k! = [exp(n)] (integer floor of e^n).at n=27A100064
• A scaled Legendre triangle.at n=39A110124
• A recursion triangle sequence based on the Eulerian numbers: A(n,k)=n*A(n-1,k-1)+k*Eulerian(n-1,k).at n=30A157743
• Numbers with prime factorization pqr^2s^5.at n=24A190293
• Antidiagonal sums of the convolution array A213778.at n=31A213780
• a(n) = Product_{p prime, p <= n} floor(n/p).at n=34A309912
• Pythagorean triples (X, Y, Z) that are the componentwise products of 2 primitive Pythagorean triples (x,y,z) and (r,s,t), that is, X=x*r, Y=y*s, ordered by increasing Z.at n=16A340790
• a(n) = (n - 1) * (n - 2) * sigma(n).at n=34A374915