Number of 9's in all partitions of n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =1a(9) =1a(10) =2a(11) =3a(12) =5a(13) =7a(14) =11a(15) =15a(16) =22a(17) =31a(18) =43a(19) =58a(20) =80a(21) =106a(22) =142a(23) =187a(24) =246a(25) =319a(26) =416a(27) =533a(28) =685a(29) =872