Number of subtraction steps in n-th interval between special points in Recamán's sequence A005132.

Terms

a(0) =0a(1) =0a(2) =1a(3) =2a(4) =4a(5) =9a(6) =18a(7) =28a(8) =57a(9) =101a(10) =196a(11) =338a(12) =615a(13) =1145a(14) =2137a(15) =3951a(16) =7000a(17) =12924a(18) =21333a(19) =40977a(20) =73280a(21) =130838a(22) =222453a(23) =376848a(24) =718691a(25) =1279333a(26) =2213812a(27) =4093786a(28) =6874504a(29) =12954041