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
Keywords
Programs
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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