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A074418
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Number of 5-ary Lyndon words of length n over Z_5 with trace 1 and subtrace 1.
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7
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0, 0, 2, 6, 25, 99, 450, 1965, 8736, 39050, 177500, 813490, 3756250, 17438400, 81380200, 381463875, 1795156250, 8477122367, 40154790296, 190734843750, 908261160564, 4334882723750, 20732050781250, 99341074218100, 476837158203125, 2292486326246875
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OFFSET
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1,3
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COMMENTS
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Same as number of Lyndon words of length n over Z_5 with trace 2 and subtrace 4; trace 3 and subtrace 4; trace 4 and subtrace 1. Same as number of Lyndon words of length n over GF(5) with trace 1 and subtrace 1; trace 2 and subtrace 4; trace 3 and subtrace 4; trace 4 and subtrace 1.
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LINKS
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EXAMPLE
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a(3;2,4)=2 since the two 5-ary Lyndon words of trace 2, subtrace 4 and length 3 are ( 124, 142 }.
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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