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A273064 Discriminator of the factorials A000142. 1
1, 2, 3, 7, 10, 13, 13, 13, 31, 37, 37, 37, 61, 61, 61, 83, 83, 83, 127, 127, 127, 127, 127, 179, 179, 179, 179, 179, 193, 193, 193, 193, 193, 193, 193, 193, 277, 277, 277, 277, 277, 277, 383, 383, 383, 383, 383, 479, 479, 479, 479, 479, 479, 479, 541, 541, 541, 541, 541, 541, 541, 541, 541, 641, 641, 641, 641, 641, 641, 641 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

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

Here we take the factorials starting with 1! = 1.

Differs from A208494 only at n=1. - R. J. Mathar, May 15 2016

LINKS

Table of n, a(n) for n=1..70.

CROSSREFS

Cf. A000142.

Sequence in context: A285550 A171863 A101956 * A341238 A002238 A002255

Adjacent sequences:  A273061 A273062 A273063 * A273065 A273066 A273067

KEYWORD

nonn

AUTHOR

Jeffrey Shallit, May 14 2016

STATUS

approved

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Last modified July 30 18:34 EDT 2021. Contains 346359 sequences. (Running on oeis4.)