OFFSET
1,2
COMMENTS
See A037278(n) = concatenation of divisors of n and A176558(n) = reverse concatenation of divisors of n. See A176553, A089374. Sequence of corresponding values of concatenations of divisors of a(n): {1, 13, 17, 113, 131, 197, ...), sequence of corresponding values of reverse concatenations of divisors of a(n): {1, 31, 71, 131, 311, 971, ...).
EXAMPLE
a(5) = 31; divisors of 31: 1, 31; both concatenation of divisors 131 and reverse concatenation of divisors 311 are noncomposite.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Jaroslav Krizek, Apr 21 2010
EXTENSIONS
Expanded and revised by Charles R Greathouse IV, Apr 24 2010
STATUS
approved