Number of primitive (period n) step cyclic shifted sequence structures using a maximum of two different symbols.

A056439

Number of primitive (period n) step cyclic shifted sequence structures using a maximum of two different symbols.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =5a(6) =4a(7) =10a(8) =9a(9) =22a(10) =14a(11) =78a(12) =36a(13) =124a(14) =180a(15) =343a(16) =260a(17) =1329a(18) =804a(19) =3732a(20) =4428a(21) =9742a(22) =8384a(23) =47364a(24) =33778a(25) =108292a(26) =138756a(27) =408244a(28) =331184a(29) =2251604

External references