Number of primitive (aperiodic) step shifted (decimated) sequence structures using exactly three different symbols.

A056407

Number of primitive (aperiodic) step shifted (decimated) sequence structures using exactly three different symbols.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =4a(4) =8a(5) =49a(6) =54a(7) =280a(8) =524a(9) =2362a(10) =2872a(11) =22694a(12) =21866a(13) =131696a(14) =298783a(15) =904634a(16) =1341518a(17) =10744516a(18) =10748218a(19) =72886710a(20) =145274501a(21) =522816718a(22) =713023210a(23) =5892611212a(24) =7059926597a(25) =35300963684a(26) =70604007679

External references