Woodall number

In number theory, a Woodall number (W_n) is any natural number of the form

${\displaystyle W_{n}=n\cdot 2^{n}-1}$

for some natural number n. The first few Woodall numbers are:

1, 7, 23, 63, 159, 383, 895, … (sequence A003261 in the OEIS).