Number of partitions of n^2 into at most three parts.

Terms

a(0) =1a(1) =1a(2) =4a(3) =12a(4) =30a(5) =65a(6) =127a(7) =225a(8) =374a(9) =588a(10) =884a(11) =1281a(12) =1801a(13) =2465a(14) =3300a(15) =4332a(16) =5590a(17) =7105a(18) =8911a(19) =11041a(20) =13534a(21) =16428a(22) =19764a(23) =23585a(24) =27937a(25) =32865a(26) =38420a(27) =44652a(28) =51614a(29) =59361