75456

Appears in sequences

• Second series of Hankel determinants based on A001044(n+1)=((n+1)!)^2 : a(n)=det(A001044(i+j-1))=det(((i+j-1)!)^2), i,j=1,2...n. Hankel transform of A001044(n+1).at n=2A165344
• Numbers k such that (182*10^k + 1)/3 is prime.at n=24A282358
• Number of n X 3 0..1 arrays with every element unequal to 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.at n=20A303631