Number of ways of placing n labeled balls into 9 indistinguishable boxes; word structures of length n using a 9-ary alphabet.

A164863

Number of ways of placing n labeled balls into 9 indistinguishable boxes; word structures of length n using a 9-ary alphabet.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =52a(6) =203a(7) =877a(8) =4140a(9) =21147a(10) =115974a(11) =678514a(12) =4211825a(13) =27602602a(14) =190077045a(15) =1368705291a(16) =10254521370a(17) =79527284317a(18) =635182667816

External references