First number of height n in Recamán's sequence A005132.

Terms

a(0) =0a(1) =1a(2) =3a(3) =6a(4) =13a(5) =20a(6) =43a(7) =62a(8) =113a(9) =224a(10) =367a(11) =494a(12) =833a(13) =1815a(14) =3379a(15) =5551a(16) =9169a(17) =17864a(18) =32978a(19) =58964a(20) =106218a(21) =131313a(22) =155719a(23) =180118a(24) =591890a(25) =881467a(26) =1345004a(27) =3012446a(28) =5728819a(29) =9309579