2003229469
domain: N
Appears in sequences
- a(n) = 3*a(n-1) + a(n-2), with a(0)=0, a(1)=1.at n=19A006190
- Pisot sequences E(3,10), P(3,10).at n=17A020704
- Denominators of continued fraction convergents to sqrt(13).at n=30A041019
- a(n) = 11*a(n-1) - a(n-2) with a(1)=1, a(2) = 10.at n=9A078922
- Main diagonal of array A094954.at n=9A094955
- Hypotenuses of primitive Pythagorean triples in A195550 and A195551.at n=8A195552
- Hypotenuses of primitive Pythagorean triples in A195559 and A195560.at n=15A195561
- Primitive part of A006190(n), n >= 1.at n=18A253807
- a(n) is the greatest divisor of A006190(n) that is coprime to A006190(m) for all positive integers m < n.at n=18A309525