Number of collections of nonempty multisets with a total of n objects of exactly three colors.

A255943

Number of collections of nonempty multisets with a total of n objects of exactly three colors.

Terms

    a(0) =5a(1) =33a(2) =141a(3) =492a(4) =1518a(5) =4320a(6) =11567a(7) =29601a(8) =72981a(9) =174652a(10) =407367a(11) =929859a(12) =2082284a(13) =4585752a(14) =9947997a(15) =21290967a(16) =45007311a(17) =94072878a(18) =194580977a(19) =398589723a(20) =809124321a(21) =1628620153a(22) =3252021750a(23) =6444843618a(24) =12681419489a(25) =24784331646a(26) =48126098418a(27) =92876836752

External references