154634

Appears in sequences

• a(n) = 6*a(n-2) - a(n-4).at n=15A006452
• a(n) = 6*a(n-1) - a(n-2), n >= 2, a(0)=1, a(1)=4.at n=7A038723
• Solutions (value of r) of the Diophantine equation 2*x^2 + 3*x + 2 = r^2.at n=6A055979
• Sequences A006452 and A216134 interlaced.at n=30A216162
• Numbers k such that k^2-1 is a triangular number and k^2+1 is a prime.at n=5A226070
• Expansion of (1 + 6*x + 17*x^2 - x^3 - 3*x^4)/(1 - 6*x^2 + x^4).at n=12A227792
• a(n) = sqrt(A299921(n)).at n=22A301318