Number of step cyclic shifted sequence structures using a maximum of four different symbols.

A056431

Number of step cyclic shifted sequence structures using a maximum of four different symbols.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =7a(4) =7a(5) =33a(6) =29a(7) =149a(8) =245a(9) =1230a(10) =1665a(11) =15973a(12) =18199a(13) =134482a(14) =376433a(15) =1415209a(16) =2634597a(17) =26534612a(18) =33499359a(19) =287002711a(20) =727425501a(21) =3332040944a(22) =5794658931a(23) =61120855045a(24) =93825569009a(25) =601444738252

External references