Number of partitions of 6n into exactly 4 parts.

Terms

a(0) =0a(1) =2a(2) =15a(3) =47a(4) =108a(5) =206a(6) =351a(7) =551a(8) =816a(9) =1154a(10) =1575a(11) =2087a(12) =2700a(13) =3422a(14) =4263a(15) =5231a(16) =6336a(17) =7586a(18) =8991a(19) =10559a(20) =12300a(21) =14222a(22) =16335a(23) =18647a(24) =21168a(25) =23906a(26) =26871a(27) =30071a(28) =33516a(29) =37214