215157040700
domain: N
Appears in sequences
- a(n) = 6*a(n-1) - a(n-2).at n=15A005319
- Numerators of continued fraction convergents to sqrt(18).at n=14A041026
- Numerators of continued fraction convergents to sqrt(162).at n=24A041298
- Numerators of continued fraction convergents to sqrt(242).at n=24A041452
- Numerators of continued fraction convergents to sqrt(722).at n=20A042390
- a(n) = 2*a(n-1) + a(n-2), with a(0) = 1, a(1) = 2, a(2) = 4.at n=30A052542
- Expansion of g.f. (1+x)*(3+x)/(1+6*x^2+x^4).at n=29A100434
- A005319 and A002315 interleaved.at n=30A143608
- Numerators of fractions in a 'zero-transform' approximation of sqrt(2) by means of a(n) = (a(n-1) + c)/(a(n-1) + 1) with c=2 and a(1)=0.at n=30A163271