Number of partitions of n with exactly four part sizes.

Terms

a(0) =1a(1) =2a(2) =5a(3) =10a(4) =20a(5) =30a(6) =52a(7) =77a(8) =117a(9) =162a(10) =227a(11) =309a(12) =414a(13) =535a(14) =692a(15) =873a(16) =1100a(17) =1369a(18) =1661a(19) =2030a(20) =2438a(21) =2925a(22) =3450a(23) =4108a(24) =4759a(25) =5570a(26) =6440a(27) =7457a(28) =8491a(29) =9798