26102926097
domain: N
Appears in sequences
- Pell-Lucas numbers: numerators of continued fraction convergents to sqrt(2).at n=28A001333
- a(0) = 1, a(1) = 3; for n > 1, a(n) = 6*a(n-1) - a(n-2).at n=14A001541
- Numerators of continued fraction convergents to sqrt(8).at n=27A041010
- Numerators of continued fraction convergents to sqrt(18).at n=13A041026
- Numerators of continued fraction convergents to sqrt(32).at n=27A041052
- Numerators of continued fraction convergents to sqrt(72).at n=13A041126
- Numerators of continued fraction convergents to sqrt(288).at n=13A041542
- Numerators of continued fraction convergents to sqrt(338).at n=19A041638
- a(n) = a(-n) = 34*a(n-1) - a(n-2), and a(0)=1, a(1)=17.at n=7A056771
- a(n) is the least natural number m such that the fractional part of m*(2^0.5) is less than 2^(-n).at n=34A058580
- Numbers k such that k^2-1 and k^2 are consecutive powerful numbers.at n=29A060860
- Expansion of (1+x)/(1-2*x-x^2).at n=27A078057
- a(0) = a(1) = 1; thereafter a(2*n+1) = 2*a(2*n) - a(2*n-1), a(2*n) = 4*a(2*n-1) - a(2*n-2).at n=28A079496
- Logarithmic derivative of the g.f. of A113281.at n=27A113282
- a(n) = -2*a(n-1) + a(n-2) for n>1, a(0)=1, a(1)=-1.at n=28A123335
- a(n) = 6*a(n-2) - a(n-4) for n > 4, with a(1)=1, a(2)=0, a(3)=3, a(4)=2.at n=28A126354
- Numerators of the upper principal and intermediate convergents to 2^(1/2).at n=27A143609
- Denominators of continued fraction convergents to sqrt(8/9).at n=14A144534
- a(1)=1, a(2)=17; thereafter a(n) = 6*a(n-1)-a(n-2)+c, where c=-4 if n is odd, c=12 if n is even.at n=13A184327
- Numbers such that floor(a(n)^2 / 8) is again a square.at n=29A204514