659456

Appears in sequences

• Numbers n such that n+cototient(n) is a power of 2.at n=37A053159
• Nonprimes n such that n+cototient(n) is a power of 2.at n=30A053162
• a(n) = 2*a(n-1) + 4*a(n-2), a(0)=1, a(1)=1.at n=12A084057
• a(n) = 4^n * T(n,3/2) where T is the Chebyshev polynomial of the first kind.at n=6A099140
• Hankel transform of A128057.at n=12A128056
• Duplicate of A084057.at n=11A163302
• Triangular array T; for n>0, row n shows the coefficients of a reduced polynomial having zeros -k/(n+1) for k=1,2,...,n.at n=33A203904