Number of partitions in all twice partitions of n where both partitions are strict.

Terms

a(0) =0a(1) =1a(2) =1a(3) =4a(4) =6a(5) =11a(6) =20a(7) =33a(8) =57a(9) =100a(10) =165a(11) =254a(12) =417a(13) =649a(14) =1039a(15) =1648a(16) =2540a(17) =3836a(18) =6020a(19) =9035a(20) =13645a(21) =20752a(22) =31054a(23) =45993a(24) =68668a(25) =101511a(26) =149525a(27) =220132a(28) =321614a(29) =468031