55602393

Appears in sequences

• a(n) = 3*a(n-1) + a(n-2), with a(0)=0, a(1)=1.at n=16A006190
• Pisot sequences E(3,10), P(3,10).at n=14A020704
• Denominators of continued fraction convergents to sqrt(13).at n=25A041019
• Numbers k such that 13*k^2 + 4 is a square.at n=8A075835
• a(n) = 2*a(n-2)+4*a(n-4)+a(n-6), n>11.at n=35A107855
• a(n) = 3*a(n-2) + a(n-4), a(0)=a(1)=0, a(2)=1, a(3)=2.at n=32A305889
• a(n) is the denominator of the Heron sequence with h(0) = 3.at n=4A319750