OFFSET
1,1
LINKS
Matthew House, Table of n, a(n) for n = 1..10000
MATHEMATICA
Flatten[Position[Partition[Table[If[MemberQ[Partition[IntegerDigits[n, 8], 2, 1], {7, 4}], 1, 0], {n, 4000}], 2, 1], {0, 1}]] + 1 (* Vincenzo Librandi, Aug 18 2015 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved