a(2*n) = floor( 17*2^n/14 ), a(2*n+1) = floor( 12*2^n/7 ).

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =4a(5) =6a(6) =9a(7) =13a(8) =19a(9) =27a(10) =38a(11) =54a(12) =77a(13) =109a(14) =155a(15) =219a(16) =310a(17) =438a(18) =621a(19) =877a(20) =1243a(21) =1755a(22) =2486a(23) =3510a(24) =4973a(25) =7021a(26) =9947a(27) =14043a(28) =19894a(29) =28086