OFFSET
1,6
LINKS
Remi Eismann, Table of n, a(n) for n = 1..10000
EXAMPLE
For n = 1 we have prime(n) = 2, prime(n+2) = 5; there is no k such that 5 - 2 = 3 = (2 mod k), hence a(1) = 0.
For n = 6 we have prime(n) = 13, prime(n+2) = 19; 7 is the smallest k such that 19 - 13 = 6 = (13 mod k), hence a(6) = 7.
For n = 30 we have prime(n) = 113, prime(n+2) = 131; 19 is the smallest k such that 131 - 113 = 18 = (113 mod k), hence a(30) = 19.
CROSSREFS
KEYWORD
nonn
AUTHOR
Rémi Eismann, Oct 20 2007
STATUS
approved