28601

Appears in sequences

• Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 5,5,1,1,1,1,1 for x=0,1,2,3,4,5,6.at n=6A198040
• Binary-ternary Wedderburn-Etherington numbers.at n=13A268172
• Numbers k such that k![10]-2 is prime, where k![10] is the ten-fold multifactorial.at n=65A283559
• Bases b where exactly eight primes p with p < b exist such that p is a base-b Wieferich prime.at n=12A325884
• Place n equally spaced points on the circumference of a circle of radius r and then connect each pair of points with straight lines whose intersections create A007569(n) - n additional points. Draw a circle of radius r around each of the A007569(n) points. The sequence gives the total number of vertices formed from all circle intersections.at n=9A374825