OFFSET
1,1
MATHEMATICA
Select[Range[3500], MemberQ[Partition[IntegerDigits[#], 2, 1], {1, 7}] && !MemberQ[Partition[IntegerDigits[#+1], 2, 1], {1, 7}]&] (* Harvey P. Dale, Nov 11 2011 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved