OFFSET
1,2
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
Select[Range[300], Max[Abs[Differences[IntegerDigits[#, 9]]]]<2&] (* Harvey P. Dale, Oct 15 2014 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved