Number of collections of nonempty multisets with a total of n objects of exactly four colors.
A255944
Number of collections of nonempty multisets with a total of n objects of exactly four colors.
Terms
- a(0) =15a(1) =144a(2) =848a(3) =3936a(4) =15800a(5) =57420a(6) =194034a(7) =619912a(8) =1894152a(9) =5579536a(10) =15939998a(11) =44363268a(12) =120707904a(13) =321973720a(14) =843826794a(15) =2176829360a(16) =5535969328a(17) =13896678404a(18) =34470255256a(19) =84565452840a(20) =205353216490a(21) =493934650180
External references
- oeis: A255944