(a(n-2) XOR a(n-1)) OR (highest bit of a(n-2))*2 OR 1; a(0)=2, a(1)=3.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =11a(5) =13a(6) =23a(7) =27a(8) =45a(9) =55a(10) =91a(11) =109a(12) =183a(13) =219a(14) =365a(15) =439a(16) =731a(17) =877a(18) =1463a(19) =1755a(20) =2925a(21) =3511a(22) =5851a(23) =7021a(24) =11703a(25) =14043a(26) =23405a(27) =28087a(28) =46811a(29) =56173