Restricted partitions.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =1a(5) =2a(6) =4a(7) =7a(8) =13a(9) =24a(10) =43a(11) =78a(12) =140a(13) =251a(14) =452a(15) =812a(16) =1457a(17) =2617a(18) =4697a(19) =8428a(20) =15126a(21) =27142a(22) =48700a(23) =87384a(24) =156787a(25) =281307a(26) =504723a(27) =905562a(28) =1624731a(29) =2915039