123469875

Appears in sequences

• Numbers containing nine distinct decimal digits (zero is not considered) and having the property that the digits 1 to 5 appear in the order but not the digits 1 to 6.at n=23A247187
• a(n) is the smallest number k that is the concatenation of the elements of a 3 X 3 matrix whose determinant is n and whose elements are a permutation of the numbers 1 through 9; a(n) = -1 if no such number k exists.at n=11A372708