A273377 Discriminator of the double factorial of odd numbers (A001147).

1, 3, 5, 11, 11, 11, 19, 23, 23, 41, 41, 64, 83, 89, 89, 89, 89, 89, 89, 89, 89, 109, 109, 167, 167, 167, 167, 167, 167, 167, 167, 167, 167, 167, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 283, 379, 379, 421, 421, 421, 421, 421, 421, 421, 421, 421, 421, 421, 421, 421, 421, 421, 421, 421, 421, 421, 421, 421, 421, 421

Offset: 1

Author

Jeffrey Shallit, May 21 2016

Keywords

• nonn

Comments

The discriminator of a sequence is the least positive integer k such that the first n terms of the sequence are pairwise

incongruent, modulo k.

Here we are taking A001147 beginning at position 1.