A037391 Numbers k such that every base-4 digit of k is a base-9 digit of k.

1, 2, 3, 81, 84, 85, 93, 101, 102, 105, 106, 110, 162, 168, 170, 174, 190, 191, 243, 244, 252, 253, 254, 255, 325, 341, 650, 750, 758, 768, 837, 885, 894, 918, 919, 921, 922, 923, 925, 926, 939, 957, 972, 973, 974, 975, 976, 977

Offset

1,2

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Prog

(Haskell)
import Data.List ((\\), nub)
a037391 n = a037391_list !! (n-1)
a037391_list = filter f [1..] where
   f x = null $ nub (ds 4 x) \\ nub (ds 9 x)
   ds b x = if x > 0 then d : ds b x' else []  where (x', d) = divMod x b
-- Reinhard Zumkeller, May 30 2013

Crossrefs

Cf. A037387, A037388, A037389, A037390, A037392.

Sequence in context: A370993 A371228 A068185 * A037427 A042549 A365291

Adjacent sequences: A037388 A037389 A037390 * A037392 A037393 A037394

Keyword

nonn,base

Author

Clark Kimberling

Status

approved