606529080

Appears in sequences

• a(n) = 3*a(n-1) + a(n-2), with a(0)=0, a(1)=1.at n=18A006190
• Pisot sequences E(3,10), P(3,10).at n=16A020704
• Numbers k such that 13*k^2 + 4 is a square.at n=9A075835
• Denominators of the continued fraction convergents to sqrt(13)/2 = A295330.at n=17A295332
• a(n) = 3*a(n-2) + a(n-4), a(0)=a(1)=0, a(2)=1, a(3)=2.at n=36A305889