References to A052307

Triangle read by rows: T(n,k) = number of bracelets (reversible necklaces) with n beads, k of which are black and n-k are white.
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 3, 3, 3, 1, 1, 1, 1, 3, 4, 4, 3

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