Number of twice-partitions of n into distinct strict partitions.

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =4a(5) =7a(6) =13a(7) =20a(8) =32a(9) =51a(10) =83a(11) =130a(12) =206a(13) =320a(14) =496a(15) =759a(16) =1171a(17) =1786a(18) =2714a(19) =4104a(20) =6193a(21) =9286a(22) =13920a(23) =20737a(24) =30865a(25) =45721a(26) =67632a(27) =99683a(28) =146604a(29) =214865