Trisection of A007294.

Terms

a(0) =1a(1) =2a(2) =4a(3) =7a(4) =11a(5) =17a(6) =25a(7) =36a(8) =50a(9) =68a(10) =92a(11) =121a(12) =159a(13) =205a(14) =262a(15) =332a(16) =417a(17) =520a(18) =645a(19) =793a(20) =971a(21) =1180a(22) =1430a(23) =1722a(24) =2065a(25) =2467a(26) =2934a(27) =3478a(28) =4109a(29) =4835