a(n) = A005291(n) + A005291(n+1).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =5a(6) =7a(7) =11a(8) =15a(9) =22a(10) =30a(11) =43a(12) =58a(13) =81a(14) =109a(15) =150a(16) =200a(17) =271a(18) =359a(19) =481a(20) =633a(21) =838a(22) =1095a(23) =1438a(24) =1867a(25) =2430a(26) =3136a(27) =4053a(28) =5200a(29) =6676