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A272882 Discriminator of the Cantor numbers (A005823) 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

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

Table of n, a(n) for n=1..72.

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

FORMULA

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

CROSSREFS

Cf. A005823.

Sequence in context: A063202 A058020 A069201 * A077800 A073340 A118409

Adjacent sequences:  A272879 A272880 A272881 * A272883 A272884 A272885

KEYWORD

nonn

AUTHOR

Jeffrey Shallit, May 08 2016

STATUS

approved

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Last modified April 14 05:25 EDT 2021. Contains 342944 sequences. (Running on oeis4.)