A272882 Discriminator of the Cantor numbers (A005823).

1, 3, 5, 5, 7, 11, 13, 15, 19, 21, 31, 33, 37, 39, 41, 41, 43, 47, 49, 59, 61, 65, 67, 95, 97, 101, 103, 113, 115, 119, 121, 123, 127, 129, 139, 141, 145, 147, 175, 177, 181, 183, 193, 195, 199, 201, 283, 285, 289, 291, 301, 303, 307, 309, 337, 339, 343, 345, 355, 357, 361, 363, 365, 365, 367, 371, 373, 383, 385, 389, 391, 419

Offset: 1

Author

Jeffrey Shallit, May 08 2016

Keywords

• nonn

Comments

The discriminator of the sequence is the least positive integer k such that the first n terms of the sequence are distinct modulo k.

Links

• S. Haque and J. Shallit, Discriminators and k-regular sequences, arXiv:1605.00092 [cs.DM], 2016.

Crossrefs

Cf. A005823.

Formula

The linked paper by Haque and Shallit gives a conjectured recursive description of the sequence.