OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
Transpose[SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 4], {1, 3}]>0, 1, 0], {n, 700}], {1, 0}]][[1]] (* The program uses the SequencePosition and SequenceCount functions from Mathematica version 10 *) (* Harvey P. Dale, Apr 19 2015 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved