login
A180611
Largest palindromic prime divisor of semiprime(n). Zero if no such divisor exists.
0
2, 3, 3, 5, 7, 5, 7, 11, 5, 2, 11, 2, 7, 2, 3, 2, 7, 3, 11, 3, 2, 2, 5, 3, 2, 11, 2, 5, 2, 3, 7, 3, 2, 5, 2, 3, 5, 2, 7, 11, 2, 3, 3, 7, 2, 3, 2, 11, 5, 2, 5, 2, 3, 7, 2, 0, 3, 2, 3, 5, 11, 2, 3, 101, 7, 5, 2, 11, 3, 2, 5, 7, 2, 3, 0, 2, 5, 3, 0, 3, 11, 2, 7, 131, 5, 3, 2, 2, 7, 0, 3, 5, 2, 0, 7, 151, 101, 5
OFFSET
1,1
FORMULA
a(n) = A180506(A001358(n)). - R. J. Mathar, Sep 19 2010
CROSSREFS
Sequence in context: A373751 A066072 A239586 * A084127 A377214 A089934
KEYWORD
base,nonn
AUTHOR
Giovanni Teofilatto, Sep 12 2010
EXTENSIONS
Missing term inserted by R. J. Mathar, Sep 19 2010
STATUS
approved