Number of parts in all twice partitions of n where the first partition is strict.

Terms

a(0) =0a(1) =1a(2) =3a(3) =11a(4) =21a(5) =58a(6) =128a(7) =276a(8) =516a(9) =1169a(10) =2227a(11) =4324a(12) =8335a(13) =15574a(14) =29116a(15) =55048a(16) =97698a(17) =176291a(18) =323277a(19) =563453a(20) =1005089a(21) =1770789a(22) =3076868a(23) =5293907a(24) =9184885a(25) =15668638a(26) =26751095a(27) =45517048a(28) =76882920a(29) =128738414