login
A086507
If n is even, a(n) = smallest prime == 1 (mod n), If n is odd, a(n) = smallest prime == -1 (mod n).
2
2, 3, 2, 5, 19, 7, 13, 17, 17, 11, 43, 13, 103, 29, 29, 17, 67, 19, 37, 41, 41, 23, 137, 73, 149, 53, 53, 29, 173, 31, 61, 97, 131, 103, 139, 37, 73, 191, 233, 41, 163, 43, 257, 89, 89, 47, 281, 97, 97, 101, 101, 53, 211, 109, 109, 113, 113, 59, 353, 61, 487, 311, 251
OFFSET
1,1
LINKS
MAPLE
f:= proc(n) local x;
if n::even then x:= 1 else x:= -1; fi;
do
x:= x+n;
if isprime(x) then return x fi
od
end proc:
map(f, [$1..100]); # Robert Israel, Dec 09 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Jul 29 2003
EXTENSIONS
More terms from David Wasserman, Mar 09 2005
STATUS
approved