Stamp folding $s(6)$

One way to fold a strip of 6 stamps

The number of distinct ways to fold a strip of $6$ labeled stamps.

Value: $144$

Updates from the literature

Lower bound: $144$
Reference unknown
[via Number of ways of folding a strip of n labeled stamps. - OEIS]
Upper bound: $144$
Reference unknown
[via Number of ways of folding a strip of n labeled stamps. - OEIS]