Number of 6-bead necklaces labeled with numbers -n..n allowing reversal, with sum zero with no three beads in a row equal.

A209347

Number of 6-bead necklaces labeled with numbers -n..n allowing reversal, with sum zero with no three beads in a row equal.

Terms

    a(0) =14a(1) =146a(2) =770a(3) =2698a(4) =7358a(5) =16968a(6) =34720a(7) =64942a(8) =113288a(9) =186906a(10) =294616a(11) =447084a(12) =657006a(13) =939270a(14) =1311146a(15) =1792454a(16) =2405742a(17) =3176460a(18) =4133144a(19) =5307578a(20) =6734984a(21) =8454190a(22) =10507808a(23) =12942408a(24) =15808702a(25) =19161706a(26) =23060930a(27) =27570546a(28) =32759566

External references