|
|
A061807
|
|
Smallest positive multiple of n containing only even digits.
|
|
7
|
|
|
2, 2, 6, 4, 20, 6, 28, 8, 288, 20, 22, 24, 26, 28, 60, 48, 68, 288, 228, 20, 42, 22, 46, 24, 200, 26, 486, 28, 406, 60, 62, 64, 66, 68, 280, 288, 222, 228, 468, 40, 82, 42, 86, 44, 2880, 46, 282, 48, 686, 200, 204, 208, 424, 486, 220, 224, 228, 406, 826, 60, 244, 62
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
EXAMPLE
|
a(7) = 28 because among the multiples of 7, that is, 7, 14, 21, 28,... 28 is the smallest multiple with only even digits.
|
|
MATHEMATICA
|
Table[k = n; While[Length[Intersection[{1, 3, 5, 7, 9}, IntegerDigits[k]]] > 0, k = k + n]; k, {n, 100}] (* T. D. Noe, Jun 03 2013 *)
spme[n_]:=Module[{k=1}, While[AnyTrue[IntegerDigits[k*n], OddQ], k++]; k*n]; Array[spme, 70] (* Harvey P. Dale, Mar 19 2024 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
base,nonn,easy
|
|
AUTHOR
|
|
|
EXTENSIONS
|
Corrected and extended by Larry Reeves (larryr(AT)acm.org), May 29 2001
|
|
STATUS
|
approved
|
|
|
|