A048550 a(n+1) is the next smallest prime beginning with a(n), initial prime is 3.

3, 31, 311, 3119, 31193, 3119309, 31193093, 311930933, 31193093317, 311930933179, 3119309331797, 311930933179703, 31193093317970371, 3119309331797037107, 311930933179703710759, 31193093317970371075907

Offset

0,1

Links

Robert Israel, Table of n, a(n) for n = 0..328

Maple

f:= proc(n) local d, a;
  for d from 1 do
    for a from 10^d*n+1 by 2 to 10^d*(n+1) do
      if isprime(a) then return a fi
  od od
end proc:
R:= 3: x:= 3:
for i from 2 to 30 do
  x:= f(x);
  R:= R, x;
od:
R; # Robert Israel, Dec 13 2023

Crossrefs

Cf. A048549, A048551, A048552, A048553, A048554, A048555, A048556.

Sequence in context: A065837 A100894 A065533 * A236527 A108430 A113075

Adjacent sequences: A048547 A048548 A048549 * A048551 A048552 A048553

Keyword

nonn,base

Author

Patrick De Geest, May 15 1999

Status

approved