A074446 Number of 4-ary Lyndon words of length n over GF(4) with trace 0 and subtrace 0.

1, 0, 2, 6, 15, 40, 153, 528, 1841, 6528, 23901, 87550, 322875, 1198080, 4474738, 16779264, 63164175, 238605640, 904213989, 3436000050, 13089461538, 49977753600, 191219550297, 733008101200, 2814750270420, 10825959997440, 41699998413248, 160842848628150, 621186162441675

Offset: 1

Author

Frank Ruskey and Nate Kube, Aug 23 2002

Keywords

• nonn

Examples

			a(3;0,0)=2 since the two 4-ary Lyndon words of trace 0, subtrace 0 and length 3 are { 123, 132 }.
		

Links

• F. Ruskey, 4-ary Lyndon words with given trace and subtrace over GF(4)

Crossrefs

Cf. A074447, A074448, A074449, A074450.

Cf. A054661, A073995, A073996, A073997, A073998, A073999.

Extensions

Terms a(16) and beyond from Andrey Zabolotskiy, Jul 21 2021