%I #7 Mar 11 2015 16:12:59
%S 76,157,238,319,400,481,562,643,684,724,805,886,967,1048,1129,1210,
%T 1291,1372,1413,1453,1534,1615,1696,1777,1858,1939,2020,2101,2142,
%U 2182,2263,2344,2425,2506,2587,2668,2749,2830,2871
%N Numbers n such that string 8,4 occurs in the base 9 representation of n but not of n-1.
%t Flatten[Position[Partition[Table[If[MemberQ[Partition[IntegerDigits[n,9],2,1],{8,4}],1,0],{n,3000}],2,1],{0,1}]]+1 (* _Harvey P. Dale_, Mar 11 2015 *)
%K nonn,base
%O 1,1
%A _Clark Kimberling_