Number of bipartite partitions of n white objects and 4 black ones.

Terms

a(0) =5a(1) =12a(2) =29a(3) =57a(4) =109a(5) =189a(6) =323a(7) =522a(8) =831a(9) =1279a(10) =1941a(11) =2876a(12) =4215a(13) =6066a(14) =8644a(15) =12151a(16) =16933a(17) =23336a(18) =31921a(19) =43264a(20) =58250a(21) =77825a(22) =103362a(23) =136371a(24) =178975a(25) =233532a(26) =303268a(27) =391831a(28) =504069a(29) =645520