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

A056445

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

Terms

    a(0) =0a(1) =0a(2) =1a(3) =2a(4) =3a(5) =13a(6) =11a(7) =50a(8) =71a(9) =271a(10) =281a(11) =2139a(12) =1741a(13) =9639a(14) =20452a(15) =58019a(16) =79293a(17) =599367a(18) =566739a(19) =3667942a(20) =6931300a(21) =23775873a(22) =31008623a(23) =246106846a(24) =282422549a(25) =1357817329a(26) =2615067894a(27) =11358094490

External references