65773

Appears in sequences

• Numbers k such that 10^k + 6*R_k + 1 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=29A102940
• Positive numbers y such that y^2 is of the form x^2+(x+113)^2 with integer x.at n=12A161479
• The Wiener index of the double-comb graph \/_\/_\/...\/_\/ with 3n (n>=1) nodes. The Wiener index of a connected graph is the sum of the distances between all unordered pairs of vertices in the graph.at n=33A192025
• Number of -7..7 arrays of n elements with first, second and third differences also in -7..7.at n=4A202123
• Number of -n..n arrays of 5 elements with first, second and third differences also in -n..n.at n=6A202126
• Composite squarefree numbers that are multiples of the root mean square of their prime factors.at n=8A255356
• Positive integers that are square roots of products a*(a+d)*(a+2*d) with coprime a > 0, d >= 0.at n=17A284876
• Numbers k such that 3^k*k^3 - 2 is a prime.at n=14A366956