Sequence of Even Poulet Numbers

Sequence

The sequence of even Poulet numbers begins:

$161 \, 038, 215 \, 326, 2 \, 568 \, 226, 3 \, 020 \, 626, 7 \, 866 \, 046, 9 \, 115 \, 426, 49 \, 699 \, 666, \ldots$

This sequence is A006935 in the On-Line Encyclopedia of Integer Sequences (N. J. A. Sloane (Ed.), 2008).

Also defined as

Some sources include $2$ in this list, but as a Poulet number is usually presupposed on $\mathsf{Pr} \infty \mathsf{fWiki}$ to be composite, this has not been declared so here.

Historical Note

The $1$st even Poulet number was discovered by Derrick Henry Lehmer in $1949$.

Sources

• 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $161,038$
• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $161,038$