A093871 a(n) is the n-th prime = -1 (mod n).

2, 5, 11, 19, 89, 41, 181, 127, 251, 199, 571, 227, 1013, 433, 599, 751, 2039, 593, 2089, 859, 1637, 1429, 4001, 1103, 4049, 2053, 3779, 2267, 6263, 1499, 6571, 3583, 5279, 3943, 6089, 2879, 11321, 4597, 7331, 4919, 15497, 3779, 15307, 6599, 8009, 7681

Offset

1,1

Comments

Main diagonal of A093870.

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Maple

f:= proc(n) local p, count;
  count:= 0;
  for p from n-1 by n do
    if isprime(p) then
       count:= count+1;
       if count = n then return p fi
    fi
  od;
end proc:
map(f, [$1..100]); # Robert Israel, Nov 08 2019

Crossrefs

Cf. A077317, A038700, A093870.

Sequence in context: A106015 A178316 A179632 * A139482 A038377 A261227

Adjacent sequences: A093868 A093869 A093870 * A093872 A093873 A093874

Keyword

nonn

Author

Amarnath Murthy, Apr 20 2004

Extensions

Edited and extended by Franklin T. Adams-Watters, Aug 29 2006

Status

approved