192191

Properties

Appears in sequences

• Primes whose decimal expansion is a concatenation of two or more consecutive decreasing numbers (no leading zeros allowed).at n=23A052088
• Primes formed by concatenating k with k-1.at n=21A052089
• Number of strings of numbers x(i=1..7) in 0..n with sum i^2*x(i)^2 equal to n^2*49.at n=27A184245
• Number of nX4 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X5 binary array having determinant equal to one, with rows and columns of the latter in nondecreasing lexicographic order.at n=7A227639
• Number of achiral m-color cyclic compositions of n (that is, number of cyclic compositions of n with reflection symmetry where each part of size m can be colored with one of m colors).at n=22A308747
• Prime numbersat n=17344