10812186007
domain: N
Appears in sequences
- Pell-Lucas numbers: numerators of continued fraction convergents to sqrt(2).at n=27A001333
- NSW numbers: a(n) = 6*a(n-1) - a(n-2); also a(n)^2 - 2*b(n)^2 = -1 with b(n) = A001653(n+1).at n=13A002315
- Numerators of continued fraction convergents to sqrt(50).at n=8A041084
- Expansion of (1+x)/(1-2*x-x^2).at n=26A078057
- a(1) = 1, a(2) = 2; a(2*k) = 2*a(2*k-1) - a(2*k-2), a(2*k+1) = 4*a(2*k) - a(2*k-1).at n=26A084068
- Expansion of e.g.f.: cosh(sqrt(2)*x)*(1+exp(x)).at n=27A088014
- Composite NSW numbers.at n=8A094666
- Expansion of (1+2*x-2*x^3-3*x^2)/((x-1)*(x+1)*(x^2+2*x-1)).at n=26A100828
- Interlaces "2*n^2 - 1 is a square" with NSW numbers.at n=27A104683
- a(2n) = A002315(n), a(2n+1) = A082639(n+1).at n=26A113224
- Logarithmic derivative of the g.f. of A113281.at n=26A113282
- A nonsense sequence.at n=26A122577
- A005319 and A002315 interleaved.at n=27A143608
- a(n) = (1/2) * ((1 + sqrt(2))^(3^n) + (1 - sqrt(2))^(3^n)).at n=3A145451
- Expansion of (1+6*x+x^2-2*x^3)/((x^2+2*x-1)*(x^2-2*x-1)), bisection is NSW numbers.at n=26A159582