230804967

Appears in sequences

• Positive integer values of k such that 10*k^2 - 9 is a square.at n=16A052454
• Numerators of convergents to 3/(1 + sqrt(10)).at n=32A093611
• Numerators in convergents to infinitely repeating period 3 palindromic continued fraction [1,2,1,...].at n=32A179238
• a(n) = 6*a(n-2) + a(n-4), where a(0) = 3, a(1) = 11, a(2) = 18, a(3) = 68.at n=20A228470