OFFSET
1,6
COMMENTS
a(n) = 0 for n in A075807. - Michel Marcus, Sep 27 2017
All terms are divisible by 9. - Zak Seidov, Jun 05 2021
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
FORMULA
EXAMPLE
a(10) = 29 - 92 = -63;
a(20) = 71 - 17 = 54.
MATHEMATICA
#-IntegerReverse[#]& /@ Prime[Range[50]] (* Harvey P. Dale, Dec 20 2012 *)
PROG
(Haskell)
a068396 n = p - a004086 p where p = a000040 n
-- Reinhard Zumkeller, Feb 04 2014
(PARI) a(n) = prime(n) - fromdigits(Vecrev(digits(prime(n)))); \\ Michel Marcus, Sep 27 2017
(Python)
from sympy import prime
def a(n): pn = prime(n); return pn - int(str(pn)[::-1])
print([a(n) for n in range(1, 50)]) # Michael S. Branicky, Jun 05 2021
CROSSREFS
KEYWORD
AUTHOR
Reinhard Zumkeller, Mar 08 2002
STATUS
approved