5253004

Appears in sequences

• a(n) = 6*a(n-2) - a(n-4).at n=19A006452
• a(n) = 6*a(n-1) - a(n-2), n >= 2, a(0)=1, a(1)=4.at n=9A038723
• Solutions (value of r) of the Diophantine equation 2*x^2 + 3*x + 2 = r^2.at n=8A055979
• Sequences A006452 and A216134 interlaced.at n=38A216162
• Expansion of (1 + 6*x + 17*x^2 - x^3 - 3*x^4)/(1 - 6*x^2 + x^4).at n=16A227792
• a(n) = sqrt(A299921(n)).at n=28A301318