53531

Appears in sequences

• Semiprimes formed by concatenating n, n, and 1 for n = 1, 2, 3,....at n=22A210711
• Number of n X 5 arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..1 n X 5 array.at n=31A219499
• Nonprime squarefree numbers whose prime indices all have the same Omega (A001222) and the same sum of prime indices (A056239).at n=27A327908