Number of ways to partition the multiset consisting of n copies each of 1, 2, and 3 into n sets of size 3.
A254233
Number of ways to partition the multiset consisting of n copies each of 1, 2, and 3 into n sets of size 3.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =25a(5) =49a(6) =103a(7) =184a(8) =331a(9) =554a(10) =911a(11) =1424a(12) =2204a(13) =3278a(14) =4817a(15) =6896a(16) =9746a(17) =13487a(18) =18480a(19) =24882a(20) =33192a(21) =43683a(22) =56994a(23) =73512a(24) =94131a(25) =119340a(26) =150300a(27) =187732a(28) =233065a(29) =287248
External references
- oeis: A254233