Number of parts in all thrice partitions of n into distinct parts.

Terms

a(0) =0a(1) =1a(2) =1a(3) =7a(4) =16a(5) =35a(6) =73a(7) =170a(8) =357a(9) =799a(10) =1583a(11) =3159a(12) =6395a(13) =12669a(14) =24663a(15) =49001a(16) =92907a(17) =176482a(18) =340322a(19) =637803a(20) =1189953a(21) =2241558a(22) =4156837a(23) =7629834a(24) =14120680a(25) =25810341a(26) =47076266a(27) =85790799a(28) =155030395a(29) =279010877