A066316 Number of identity (asymmetric) bracelets (or necklaces) with n red and blue beads such that the beads switch colors when bracelet is turned over.
1, 5, 24, 91, 340, 1224, 4365, 15521, 55311, 197964, 712243, 2577105, 9375360, 34284971, 125977464, 464938189, 1722817415, 6407307543, 23909159417, 89491715105, 335908316844, 1264097675775, 4768430557020, 18027183349395
Offset: 4