886731088897
domain: N
Appears in sequences
- a(0) = 1, a(1) = 3; for n > 1, a(n) = 6*a(n-1) - a(n-2).at n=16A001541
- a(n) = 2*a(n-1)^2 - 1, if n>1. a(0)=1, a(1)=3.at n=5A001601
- Numerators of continued fraction convergents to sqrt(18).at n=15A041026
- Numerators of continued fraction convergents to sqrt(72).at n=15A041126
- Numerators of continued fraction convergents to sqrt(128).at n=15A041232
- Numerators of continued fraction convergents to sqrt(288).at n=15A041542
- Numerators of continued fraction convergents to sqrt(512).at n=23A041978
- Numerators of continued fraction convergents to sqrt(578).at n=7A042106
- a(n) = a(-n) = 34*a(n-1) - a(n-2), and a(0)=1, a(1)=17.at n=8A056771
- Expansion of (1+x)/(1-2*x-x^2).at n=31A078057
- 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=32A079496
- Denominators of continued fraction convergents to sqrt(8/9).at n=16A144534
- a(n) = cosh(2*n*arcsinh(sqrt(n))).at n=8A173174
- 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=15A184327
- Numbers such that floor(a(n)^2 / 8) is again a square.at n=33A204514
- Pierce expansion of 4*(3 - 2*sqrt(2)).at n=9A219508
- 128*n^8 - 256*n^6 + 160*n^4 - 32*n^2 + 1.at n=17A243134