Least k>1 such that complement of first n terms of A006928 repeats beginning at k-th term.

Terms

a(0) =2a(1) =2a(2) =5a(3) =5a(4) =5a(5) =5a(6) =41a(7) =41a(8) =41a(9) =41a(10) =41a(11) =41a(12) =41a(13) =41a(14) =41a(15) =41a(16) =41a(17) =41a(18) =41a(19) =41a(20) =41a(21) =41a(22) =41a(23) =41a(24) =150a(25) =150a(26) =150a(27) =912a(28) =912a(29) =912