Number of partitions of n into parts occurring in '3x+1'-trajectory starting with n.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =11a(6) =9a(7) =10a(8) =17a(9) =20a(10) =23a(11) =66a(12) =35a(13) =57a(14) =51a(15) =36a(16) =77a(17) =153a(18) =122a(19) =126a(20) =61a(21) =213a(22) =189a(23) =883a(24) =353a(25) =338a(26) =337a(27) =851a(28) =645a(29) =570