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%I #10 Jul 28 2023 23:28:45
%S 1,2,3,4,5,6,10,14,18,22,26,30,34,38,46,71,75,100,128,132,157,185,210,
%T 214,242,267,271,324,328,500,528,700,704,896,900,928,1100,1104,1296,
%U 1300,1472,1500,1504,1696,1700,1872,1900,2268
%N Numbers in which all pairs of consecutive base-7 digits differ by 2.
%t Join[Range[6],Select[Range[2500],Union[Abs[Differences[IntegerDigits[#,7]]]] == {2}&]] (* _Harvey P. Dale_, Jun 30 2022 *)
%K nonn,base
%O 1,2
%A _Clark Kimberling_