77227930

Appears in sequences

• Numerators of continued fraction convergents to sqrt(98).at n=13A041176
• a(n) = 2*a(n-1) + a(n-2), with a(0) = 1, a(1) = 2, a(2) = 4.at n=21A052542
• Numbers k such that 2*k^2 - 4 is a square.at n=10A075870
• Numerators of the upper principal and intermediate convergents to 2^(1/2).at n=20A143609
• 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=21A163271