|
|
A088618
|
|
Rearrangement of odd numbers such that every concatenation of at least two terms is composite.
|
|
0
|
|
|
1, 5, 13, 3, 15, 9, 17, 7, 23, 19, 25, 35, 21, 39, 37, 11, 33, 45, 27, 47, 31, 51, 41, 55, 29, 43, 61, 59, 57, 53, 49, 63, 65, 75, 67, 71, 69, 79, 77, 81, 73, 85, 91, 95, 83, 97, 105, 87, 101, 99, 115, 107, 93, 123, 111, 117, 113, 109, 119, 103, 121, 125, 129, 135, 133, 137
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
Conjecture: Sequence is infinite. And every odd number is a member.
|
|
LINKS
|
|
|
EXAMPLE
|
15,513,133,315,1513,5133,13315,15133,513315,1513315 all are composite.
|
|
CROSSREFS
|
|
|
KEYWORD
|
base,nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|