1047494

Appears in sequences

• Number of 2n-bead balanced binary necklaces of fundamental period 2n which are equivalent to their reversed complement, but are not equivalent to their reverse and complement.at n=21A045687
• Number of primitive (aperiodic) palindromic structures of length n using a maximum of two different symbols.at n=42A056476
• Number of primitive (aperiodic) palindromic structures using exactly two different symbols.at n=42A056481