Number of ternary Lyndon words whose digits sum to 0 mod 3; also number of trace 0 irreducible polynomials over GF(3).
A046209
Number of ternary Lyndon words whose digits sum to 0 mod 3; also number of trace 0 irreducible polynomials over GF(3).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =16a(5) =38a(6) =104a(7) =270a(8) =726a(9) =1960a(10) =5368a(11) =14736a(12) =40880a(13) =113828a(14) =318848a(15) =896670a(16) =2532160a(17) =7174050a(18) =20390552a(19) =58112088a(20) =166037248a(21) =475467916a(22) =1364393896a(23) =3922624800a(24) =11297181456a(25) =32588003000a(26) =94143178098a(27) =272342710380a(28) =788854912240
External references
- oeis: A046209