A078244 Smallest multiple of n using only digits 0 and 5.

5, 50, 555, 500, 5, 5550, 5005, 5000, 555555555, 50, 55, 55500, 5005, 50050, 555, 50000, 55505, 5555555550, 55005, 500, 50505, 550, 550505, 555000, 50, 50050, 5505555555, 500500, 5505505, 5550, 555055, 500000, 555555, 555050, 5005

Offset

1,1

Comments

a(n) = min{A169964(k): k > 1 and A169964(k) mod n = 0}. [Reinhard Zumkeller, Jan 10 2012]

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..998

Mathematica

Module[{mlts=Rest[FromDigits/@Tuples[{0, 5}, 12]]}, Table[ SelectFirst[ mlts, Divisible[ #, n]&], {n, 40}]] (* Harvey P. Dale, Aug 14 2021 *)

Prog

(Haskell)
a078244 n = head [x | x <- tail a169964_list, mod x n == 0]
-- Reinhard Zumkeller, Jan 10 2012

Crossrefs

Cf. A004290, A078241-A078248, A079339, A096681-A096688.

Sequence in context: A079157 A286974 A199762 * A233068 A237020 A156058

Adjacent sequences: A078241 A078242 A078243 * A078245 A078246 A078247

Keyword

base,nonn

Author

Amarnath Murthy, Nov 23 2002

Extensions

More terms from Ray Chandler, Jul 12 2004

Status

approved