Number of primitive (aperiodic) step shifted (decimated) sequence structures using a maximum of five different symbols.

A056404

Number of primitive (aperiodic) step shifted (decimated) sequence structures using a maximum of five different symbols.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =9a(4) =17a(5) =111a(6) =156a(7) =1099a(8) =3072a(9) =21789a(10) =42334a(11) =528487a(12) =859501a(13) =8546878a(14) =31968376a(15) =159715435a(16) =398048505a(17) =5303677376a(18) =8835749346a(19) =99411964817a(20) =331215913868

External references