Number of partitions of 7n into exactly 4 parts.

Terms

a(0) =0a(1) =3a(2) =23a(3) =72a(4) =169a(5) =321a(6) =551a(7) =864a(8) =1285a(9) =1815a(10) =2484a(11) =3289a(12) =4263a(13) =5400a(14) =6736a(15) =8262a(16) =10018a(17) =11990a(18) =14222a(19) =16698a(20) =19464a(21) =22500a(22) =25857a(23) =29511a(24) =33516a(25) =37845a(26) =42555a(27) =47616a(28) =53089a(29) =58939