OFFSET
1,1
MATHEMATICA
Select[Range[2000], MemberQ[Partition[IntegerDigits[#, 7], 2, 1], {4, 4}] && !MemberQ[Partition[IntegerDigits[#-1, 7], 2, 1], {4, 4}]&] (* Harvey P. Dale, Jan 17 2014 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved