22658

Appears in sequences

• a(n) = 5*a(n-1) - a(n-2), with a(0) = 1 and a(1) = 2.at n=7A002310
• Expansion of g.f. (x^3+x^2+2*x+1)/(x^4+5*x^2+1).at n=13A101463
• Number of base-6 circular n-digit numbers with adjacent digits differing by 2 or less.at n=7A124807
• Number of partitions of n with exactly one prime number.at n=47A132381
• a(n) = 5*a(n-3) - a(n-6) with terms 1..6 as 0, 1, 2, 5, 7, 9.at n=20A142879
• a(n) = (a(n-1)*a(n-3) + 1) / a(n-4) with a(0) = a(1) = a(2) = a(3) = 1.at n=22A217787
• Generalized Markoff numbers: largest of 7-tuple of positive numbers a, b, c, d, e, f, g satisfying the Markoff(7) equation a^2+b^2+c^2+d^2+e^2+f^2+g^2 = 5abcdefg.at n=22A227212
• Values of x in the solutions to x^2 - 5xy + y^2 + 5 = 0, where 0 < x < y.at n=13A237254
• G.f. A(x) satisfies: A(x) = 1/(1 + x*A(x) + x^2*A(x)/(1 + x^3*A(x) + x^4*A(x)/(1 + x^5*A(x) + x^6*A(x)/(1 + ...)))), a continued fraction.at n=18A301410