a(n) = number of 2's between n-th 1 and (n+1)st 1 in A026600.

Terms

a(0) =2a(1) =0a(2) =2a(3) =0a(4) =1a(5) =1a(6) =1a(7) =2a(8) =1a(9) =0a(10) =1a(11) =1a(12) =1a(13) =2a(14) =0a(15) =2a(16) =0a(17) =1a(18) =1a(19) =2a(20) =0a(21) =2a(22) =0a(23) =2a(24) =0a(25) =1a(26) =2a(27) =0a(28) =1a(29) =1