643125

Appears in sequences

• Prime factorization representation of Stern polynomials: a(0) = 1, a(1) = 2, a(2n) = A003961(a(n)), a(2n+1) = a(n)*a(n+1).at n=42A260443
• Even bisection of A260443 (the odd terms): a(n) = A260443(2*n).at n=21A277323
• Twisted variant of A276086 indexed by A328625.at n=44A328624
• Twisted variant of A276086 indexed by A328626.at n=50A328627