Number of 4-ary Lyndon words of length n with exactly four 1s.
A124812
Number of 4-ary Lyndon words of length n with exactly four 1s.
Terms
- a(0) =3a(1) =21a(2) =135a(3) =702a(4) =3402a(5) =15282a(6) =65610a(7) =270540a(8) =1082565a(9) =4221639a(10) =16120377a(11) =60450138a(12) =223205220a(13) =813100356a(14) =2927177028a(15) =10428053400a(16) =36804946455a(17) =128817263385a(18) =447470664795
External references
- oeis: A124812