Number of multisets of nonempty words with a total of n letters over ternary alphabet such that all letters occur at least once in the multiset.

A320213

Number of multisets of nonempty words with a total of n letters over ternary alphabet such that all letters occur at least once in the multiset.

Terms

    a(0) =13a(1) =114a(2) =672a(3) =3334a(4) =15030a(5) =63978a(6) =261880a(7) =1043658a(8) =4076856a(9) =15688108a(10) =59650623a(11) =224625639a(12) =839026657a(13) =3112293273a(14) =11474908920a(15) =42080197859a(16) =153566261268a(17) =557943898644

External references