a(3n) = 3a(3n-1)-3a(3n-2)+2a(3n-3), a(3n+1) = 3a(3n)-3a(3n-1)+2a(3n-2), a(3n+2) = 3a(3n+1)-3a(3n), a(0) = 0, a(1) = 1, a(2) = 2.

A131761

a(3n) = 3a(3n-1)-3a(3n-2)+2a(3n-3), a(3n+1) = 3a(3n)-3a(3n-1)+2a(3n-2), a(3n+2) = 3a(3n+1)-3a(3n), a(0) = 0, a(1) = 1, a(2) = 2.

Terms

    a(0) =0a(1) =1a(2) =2a(3) =3a(4) =5a(5) =6a(6) =9a(7) =19a(8) =30a(9) =51a(10) =101a(11) =150a(12) =249a(13) =499a(14) =750a(15) =1251a(16) =2501a(17) =3750a(18) =6249a(19) =12499a(20) =18750a(21) =31251a(22) =62501a(23) =93750a(24) =156249a(25) =312499a(26) =468750a(27) =781251a(28) =1562501a(29) =2343750

External references