OFFSET
0,9
COMMENTS
a(n) is a multiple of 7.
FORMULA
a(n) = n - A030107(n).
MATHEMATICA
Array[#-FromDigits[Reverse[IntegerDigits[#, 8]], 8]&, 80, 0] (* Harvey P. Dale, Jun 05 2012 *)
CROSSREFS
KEYWORD
base,sign
AUTHOR
Henry Bottomley, Jul 18 2000
STATUS
approved