a(n) = A174618(n) + A174618(n+1).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =3a(6) =3a(7) =4a(8) =5a(9) =6a(10) =8a(11) =10a(12) =13a(13) =17a(14) =21a(15) =28a(16) =34a(17) =45a(18) =55a(19) =72a(20) =89a(21) =116a(22) =144a(23) =188a(24) =233a(25) =305a(26) =377a(27) =494a(28) =610a(29) =799