|
1, 3, 3, 7, 3, 13, 3, 17, 11, 17, 3, 51, 3, 21, 37, 55, 3, 83, 3, 113, 63, 29, 3, 271, 75, 33, 103, 223, 3, 453, 3, 329, 139, 41, 427, 897, 3, 45, 189, 1265, 3, 1267, 3, 651, 1277, 53, 3, 2943, 929, 1571, 313, 1001, 3, 3147, 2009, 4843
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
a(n) = 3 iff n is prime.
|
|
LINKS
|
|
|
FORMULA
|
|
|
EXAMPLE
|
a(4) = 7 since row 4 of triangle A156837 = (3, 3, 0, 1).
|
|
MAPLE
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|