Restricted partitions.

Terms

a(0) =1a(1) =1a(2) =5a(3) =13a(4) =33a(5) =73a(6) =151a(7) =289a(8) =526a(9) =910a(10) =1514a(11) =2430a(12) =3788a(13) =5744a(14) =8512a(15) =12346a(16) =17575a(17) =24591a(18) =33885a(19) =46029a(20) =61731a(21) =81805a(22) =107233a(23) =139143a(24) =178870a(25) =227930a(26) =288100a(27) =361384a(28) =450096a(29) =556834