141481

Properties

Appears in sequences

• a(n) = 3*a(n-1) + a(n-2), with a(0)=0, a(1)=1.at n=11A006190
• Pisot sequences E(3,10), P(3,10).at n=9A020704
• Denominators of continued fraction convergents to sqrt(13).at n=18A041019
• a(n) = 11*a(n-1) - a(n-2) with a(1)=1, a(2) = 10.at n=5A078922
• a(n) = 2*a(n-2)+4*a(n-4)+a(n-6), n>11.at n=25A107855
• A skew generalized Pascal triangle.at n=65A112906
• Fixed-j dispersion for Q = 13: array D(g,h) (g, h >= 1), read by ascending antidiagonals.at n=20A120862
• Numerators of partial sums for a series for Pi/3.at n=6A130413
• Hypotenuses of primitive Pythagorean triples in A195550 and A195551.at n=4A195552
• Hypotenuses of primitive Pythagorean triples in A195559 and A195560.at n=7A195561
• Primes in the Lucas U(3,-1) sequence.at n=2A201001
• List of quadruples (r,s,t,u): the matrix M = [[4,12,9][2,5,3][1,2,1]] is raised to successive powers, then (r,s,t,u) are the square roots of M[3,1], M[3,3], M[1,1], M[1,3] respectively.at n=44A249579
• Primitive part of A006190(n), n >= 1.at n=10A253807
• Primes having only {1, 4, 8} as digits.at n=28A260270
• a(n) = 3*a(n-2) + a(n-4), a(0)=a(1)=0, a(2)=1, a(3)=2.at n=22A305889
• a(n) is the greatest divisor of A006190(n) that is coprime to A006190(m) for all positive integers m < n.at n=10A309525
• Prime numbers whose binary expansion contains only prime powers of 2 and the zeroth power.at n=33A342475
• Prime numbersat n=13136