Number of partitions of n into two sorts of parts having exactly 9 parts of the second sort.

Terms

a(0) =1a(1) =11a(2) =67a(3) =298a(4) =1080a(5) =3379a(6) =9453a(7) =24204a(8) =57658a(9) =129335a(10) =275693a(11) =562454a(12) =1104484a(13) =2097247a(14) =3865383a(15) =6937016a(16) =12154390a(17) =20838939a(18) =35029203a(19) =57829458a(20) =93897437a(21) =150150058a(22) =236723504a(23) =368350864a(24) =566187387a(25) =860416074a(26) =1293614426a(27) =1925547270a(28) =2839214222a(29) =4149449828