A123700 Smallest m such that A123699(m) = n.

1, 2, 3, 4, 10, 25, 37, 61, 64, 173, 100, 1020, 1565, 1595, 2323, 3013, 3771, 11838, 9266, 30407, 56267, 46865, 117612, 143083, 216156, 412555, 413711, 818330, 1846411, 2432526, 2094521, 6909827, 15457515, 12960133, 40274514, 30277528, 53521510, 171018877, 81281761

Offset: 1

Author

Reinhard Zumkeller, Oct 09 2006

Keywords

• nonn
• base

Comments

In base n representation of a(n) all digits are distinct; this is not the case in all base b representations where b is smaller than n. And for numbers m that are smaller than a(n) exists at least one b such that in base b representation of m all digits are distinct.

Examples

			a(16)=3013 = 101111000101 [b=2] = 11010121 [b=3] = 233011 [b=4] = 44023 [b=5] = 21541 [b=6] = 11533 [b=7] = 5705 [b=8] = 4117 [b=9] = 3013 [b=10] = 229A [b=11] = 18B1 [b=12] = 14AA [b=13] = 1153 [b=14] = D5D [b=15] = BC5 [b=16] distinct digits.
		

Links

• Michael S. Branicky, Table of n, a(n) for n = 1..45

Extensions

a(37) and beyond from Michael S. Branicky, Jun 16 2022