Number of primitive (period n) step cyclic shifted sequences using exactly three different symbols.

A056425

Number of primitive (period n) step cyclic shifted sequences using exactly three different symbols.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =6a(4) =9a(5) =55a(6) =51a(7) =252a(8) =379a(9) =1491a(10) =1611a(11) =12236a(12) =10245a(13) =57057a(14) =121711a(15) =345888a(16) =474489a(17) =3589099a(18) =3397143a(19) =21983298a(20) =41570721a(21) =142617777a(22) =186027579a(23) =1476401628a(24) =1694455311a(25) =8146623393a(26) =15690140775

External references