OFFSET
1,121
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
MATHEMATICA
Table[DigitCount[n, 10, 6], {n, Prime[Range[110]]}] (* Harvey P. Dale, Mar 20 2018 *)
PROG
(Haskell)
a085980 = count6 0 . a000040 where
count6 c x | d == 6 = if x < 10 then c + 1 else count6 (c + 1) x'
| otherwise = if x < 10 then c else count6 c x'
where (x', d) = divMod x 10
-- Reinhard Zumkeller, Apr 08 2014
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Jason Earls, Jul 06 2003
STATUS
approved