OFFSET
1,1
COMMENTS
The values of n for which k^n + n is reducible over the integers are given in A097792. - Joseph Myers, Allan C. Wechsler Apr 16 2018
LINKS
Hugo Pfoertner, Table of n, a(n) for n = 1..365
FORMULA
If n + 1 is composite, then a(n) = A072883(n). - Altug Alkan, Apr 23 2018
EXAMPLE
a(2) = 3 because 3^2 + 3 = A303122(2) = 11 is prime, whereas 2^2 + 2 = 6 is composite.
CROSSREFS
KEYWORD
nonn
AUTHOR
Hugo Pfoertner, Apr 23 2018
STATUS
approved