Number of partitions of n including 3, but not 1.

Terms

a(0) =0a(1) =0a(2) =1a(3) =0a(4) =1a(5) =1a(6) =2a(7) =2a(8) =4a(9) =4a(10) =7a(11) =8a(12) =12a(13) =14a(14) =21a(15) =24a(16) =34a(17) =41a(18) =55a(19) =66a(20) =88a(21) =105a(22) =137a(23) =165a(24) =210a(25) =253a(26) =320a(27) =383a(28) =478a(29) =574