A337051 Least positive number that has exactly n different representations as the product of a number and of its decimal digits.

2, 1, 192, 1798848, 549504, 20150684596224

Offset

0,1

Links

Table of n, a(n) for n=0..5.

Example

1       = 1 * (1).
192     = 24 * (2*4)
        = 32 * (3*2).
1798848 = 6246 * (6*2*4*6)
        = 12492 * (1*2*4*9*2)
        = 33312 * (3*3*3*1*2).
549504  = 1696 * (1*6*9*6)
        = 2862 * (2*8*6*2)
        = 3392 * (3*3*9*2)
        = 3816 * (3*8*1*6).
20150684596224 = 61699872 * (6*1*6*9*9*8*7*2)
               = 123399744 * (1*2*3*3*9*9*7*4*4)
               = 242943246 * (2*4*2*9*4*3*2*4*6)
               = 323924328 * (3*2*3*9*2*4*3*2*8)
               = 416474136 * (4*1*6*4*7*4*1*3*6).

Crossrefs

Cf. A098736, A336826, A336876, A336944, A337054.

Sequence in context: A101923 A010788 A258819 * A016448 A098879 A331818

Adjacent sequences: A337048 A337049 A337050 * A337052 A337053 A337054

Keyword

nonn,base,more

Author

Chai Wah Wu, Aug 12 2020

Status

approved