a(n) = length of n-th run of identical symbols in A026513.

Terms

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