Number of step cyclic shifted sequence structures using exactly six different symbols.

A056438

Number of step cyclic shifted sequence structures using exactly six different symbols.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1a(6) =1a(7) =18a(8) =59a(9) =630a(10) =1681a(11) =28867a(12) =60083a(13) =757577a(14) =3514504a(15) =21424002a(16) =64372109a(17) =1024999230a(18) =2026631203a(19) =26920955243a(20) =105501588415a(21) =742299898741

External references