1543321

Appears in sequences

• a(n) = 3*a(n-1) + a(n-2), with a(0)=0, a(1)=1.at n=13A006190
• Pisot sequences E(3,10), P(3,10).at n=11A020704
• Denominators of continued fraction convergents to sqrt(13).at n=20A041019
• a(n) = 11*a(n-1) - a(n-2) with a(1)=1, a(2) = 10.at n=6A078922
• a(n) = 2*a(n-2)+4*a(n-4)+a(n-6), n>11.at n=29A107855
• Fixed-j dispersion for Q = 13: array D(g,h) (g, h >= 1), read by ascending antidiagonals.at n=27A120862
• Hypotenuses of primitive Pythagorean triples in A195550 and A195551.at n=5A195552
• Hypotenuses of primitive Pythagorean triples in A195559 and A195560.at n=10A195561
• Primitive part of A006190(n), n >= 1.at n=12A253807
• a(n) = 3*a(n-2) + a(n-4), a(0)=a(1)=0, a(2)=1, a(3)=2.at n=26A305889
• a(n) is the greatest divisor of A006190(n) that is coprime to A006190(m) for all positive integers m < n.at n=12A309525