Stamp folding $s(4)$
The number of distinct ways to fold a strip of $4$ labeled stamps.
Value: $16$
Updates from the literature
-
Lower bound: $16$
Reference unknown
[via Number of ways of folding a strip of n labeled stamps. - OEIS] -
Upper bound: $16$
Reference unknown
[via Number of ways of folding a strip of n labeled stamps. - OEIS]