-14155776

Appears in sequences

• a(n) = determinant(P*Q)/n! where P, Q are n X n matrices with P[i,j]=lcm(i,j), Q[i,j]=gcd(i,j).at n=9A060239
• Sequence related to the o.g.f.s. of the right hand columns of the EG1 triangle A162005.at n=3A162014
• a(n)=(5-(-1)^n-6*n)*2^(n-2).at n=19A179609
• Determinant of the n X n matrix with (i,j)-entry equal to 1 or 0 according as i + j is coprime to n or not.at n=38A228885