209004522016
domain: N
Appears in sequences
- A continued fraction.at n=26A001112
- Denominators of continued fraction convergents to sqrt(18).at n=15A041027
- Denominators of continued fraction convergents to sqrt(450).at n=21A041857
- y-values in the solution to x^2 - 18*y^2 = 1.at n=8A202299
- Binomial transform of A135318.at n=30A373245
- a(n) = 4*a(n-1) -5*a(n-2) +2*a(n-3) +2*a(n-4) for a(0) = a(1) = 0, a(2) = 1, a(3) = 4 for n >= 4.at n=31A373358