22934

Appears in sequences

• Generalization of the golden ratio (expansion of (5-13x)/((1+x)(1-4x))).at n=7A007572
• a(0) = 1, a(n) = 13*n^2 + 2 for n>0.at n=42A010004
• Fibonacci sequence beginning 2, 22.at n=16A022373
• Becomes prime after exactly 8 iterations of f(x) = sum of prime factors of x.at n=3A047827
• Number of n X n binary arrays with rows and columns, considered as graycode numbers, in nondecreasing order, and no more than 2 ones in any row or column.at n=6A162066
• 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 = 2abcdefg.at n=28A227210
• Values of x in the solutions to x^2 - 8*x*y + y^2 + 11 = 0, where 0 < x < y.at n=10A237262
• Least positive number k such that k^k is at least 10^n digits long.at n=5A246754
• Numbers whose sum of anti-divisors is equal to the sum of the divisors of their arithmetic derivative.at n=22A249912
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 339", based on the 5-celled von Neumann neighborhood.at n=32A271291
• Number of partitions such that the least positive integer which is not a part of the partition is prime.at n=40A305937
• Bisection of the numerators of the convergents of cf(1,4,1,6,1,6,...,6,1).at n=5A341927