login
A088267
Smallest number that on prefixing with the n-th term of A088265 yields prime.
2
2, 1, 3, 4, 5, 1, 5, 1, 2, 1, 6, 9, 18, 9, 5, 4, 2, 7, 3, 1, 6, 3, 11, 9, 20, 6, 32, 16, 11, 13, 11, 1, 6, 15, 6, 21, 18, 1, 5, 13, 14, 1, 6, 18, 15, 9, 12, 3, 50, 19, 56, 12, 9, 3, 5, 66, 27, 1, 8, 24, 11, 9, 11, 13, 24, 79, 3, 43, 26, 19, 11, 4, 39, 3, 45, 9, 11, 6, 6, 15, 2, 1, 41, 18, 5, 19
OFFSET
0,1
EXAMPLE
a(13) = 18 as A088265(13) = 10001 and 1810001 is a prime while 110001, 210001 to 1710001 are all composite.
CROSSREFS
Sequence in context: A331747 A375776 A285107 * A364577 A286449 A318310
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Sep 28 2003
EXTENSIONS
More terms from David Wasserman, Jul 28 2005
STATUS
approved