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

A056397

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

Terms

    a(0) =0a(1) =0a(2) =1a(3) =4a(4) =8a(5) =50a(6) =54a(7) =284a(8) =525a(9) =2370a(10) =2872a(11) =22748a(12) =21866a(13) =131750a(14) =298792a(15) =904918a(16) =1341518a(17) =10745090a(18) =10748218a(19) =72889084a(20) =145274556a(21) =522819590a(22) =713023210a(23) =5892634240a(24) =7059926605a(25) =35300985550a(26) =70604008204

External references