140589

Appears in sequences

• Inverse of coefficient array for orthogonal polynomials p(n,x)=(x-(2n-1))*p(n-1,x)-(2n-2)^2*p(n-2,x).at n=28A182824
• E.g.f. 1/(cos(sqrt(3)*x) - sin(sqrt(3)*x)/sqrt(3)).at n=7A182825
• Number of Carlitz compositions of n with exactly nine descents.at n=5A241699
• a(n) is the least number k such that the k-th difference between consecutive practical numbers, A179651(k), equals 2*n, or -1 if no such k exists.at n=32A364706