Bisection of A096441.

Terms

a(0) =0a(1) =2a(2) =4a(3) =7a(4) =11a(5) =17a(6) =26a(7) =37a(8) =54a(9) =76a(10) =106a(11) =145a(12) =199a(13) =266a(14) =357a(15) =472a(16) =621a(17) =809a(18) =1053a(19) =1354a(20) =1740a(21) =2218a(22) =2818a(23) =3559a(24) =4485a(25) =5616a(26) =7018a(27) =8728a(28) =10826a(29) =13373