Number of 7-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero and avoiding the pattern z z+1 z+2.

A209076

Number of 7-bead necklaces labeled with numbers -n..n not allowing reversal, with sum zero and avoiding the pattern z z+1 z+2.

Terms

    a(0) =39a(1) =1007a(2) =8008a(3) =37108a(4) =125428a(5) =344618a(6) =817594a(7) =1738838a(8) =3397900a(9) =6206228a(10) =10727576a(11) =17711618a(12) =28130798a(13) =43220926a(14) =64524812a(15) =93939228a(16) =133765612a(17) =186763798a(18) =256208998a(19) =345952710a(20) =460486468a(21) =605008920a(22) =785496844a(23) =1008779010

External references