1,2

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

Here we are starting the Bell number sequence at B(1).

Table of n, a(n) for n=1..71.

Cf. A000110.

Sequence in context: A035585 A239868 A159076 * A278084 A225366 A146099

Adjacent sequences: A273234 A273235 A273236 * A273238 A273239 A273240

nonn

Jeffrey Shallit, May 18 2016

approved