Number of 3's in the last section of the set of partitions of n.

Terms

a(0) =0a(1) =0a(2) =1a(3) =0a(4) =1a(5) =2a(6) =2a(7) =3a(8) =6a(9) =6a(10) =10a(11) =14a(12) =18a(13) =24a(14) =35a(15) =42a(16) =58a(17) =76a(18) =97a(19) =124a(20) =164a(21) =202a(22) =261a(23) =329a(24) =412a(25) =514a(26) =649a(27) =795a(28) =992a(29) =1223