Number of nonisomorphic proper colorings of partition star graph using four colors.

Terms

a(0) =4a(1) =12a(2) =24a(3) =36a(4) =40a(5) =108a(6) =108a(7) =60a(8) =216a(9) =180a(10) =324a(11) =324a(12) =84a(13) =360a(14) =540a(15) =648a(16) =972a(17) =972a(18) =972a(19) =112a(20) =540a(21) =1080a(22) =660a(23) =1080a(24) =2916a(25) =1512a(26) =1944a(27) =2916a(28) =2916a(29) =2916