OFFSET
1,2
COMMENTS
The first occurrence of k in this sequence is given by A049363(k).
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
Eric Weisstein's World of Mathematics, Pandigital Number
Wikipedia, Pandigital number
PROG
(Haskell)
import Data.List (unfoldr, nub); import Data.Tuple (swap)
a235708 n = f n where
f 1 = 1
f b = if isPandigital b n then b else f (b - 1) where
isPandigital b = (== b) . length . nub . unfoldr
(\x -> if x == 0 then Nothing else Just $ swap $ divMod x b)
-- Reinhard Zumkeller, May 12 2014
CROSSREFS
KEYWORD
nonn,base,nice
AUTHOR
Joonas Pohjonen, May 02 2014
STATUS
approved