1579869184

Appears in sequences

• a(n+2) = 2*a(n+1) + 2*a(n); a(0) = 1, a(1) = 3.at n=21A028859
• a(n)*a(n+3) - a(n+1)*a(n+2) = 2^n, given a(0)=1, a(1)=3, a(2)=7.at n=21A080882
• a(n) = 2*a(n-1) + 2*a(n-2) for n > 2, a(0)=1, a(1)=1, a(2)=3.at n=22A155020