Numbers n such that string 5,7 occurs in the base 8 representation of n but not of n-1.

Terms

a(0) =47a(1) =111a(2) =175a(3) =239a(4) =303a(5) =367a(6) =376a(7) =431a(8) =495a(9) =559a(10) =623a(11) =687a(12) =751a(13) =815a(14) =879a(15) =888a(16) =943a(17) =1007a(18) =1071a(19) =1135a(20) =1199a(21) =1263a(22) =1327a(23) =1391a(24) =1400a(25) =1455a(26) =1519a(27) =1583a(28) =1647a(29) =1711