A043552 Least k for which the integers floor(5*k/m) for m=2,3,...,n are distinct.

1, 1, 1, 2, 4, 4, 4, 6, 10, 13, 13, 18, 18, 22, 29, 34, 37, 42, 45, 55, 58, 65, 73, 76, 84, 93, 97, 106, 120, 125, 130, 146, 157, 163, 174, 186, 199, 205, 218, 238, 245, 260, 274, 289, 305, 312, 328, 345, 362, 379, 396, 405, 433, 442

Offset: 1

Author

Clark Kimberling

Keywords

• nonn

Crossrefs

Cf. A043549, A043550, A043551.

Programs

PARI

a(n) = my(k=1); while(#Set(vector(n-1, m, 5*k\(m+1))) != n-1, k++); k; \\ Michel Marcus, Apr 25 2021