A052230 Primes p from A031924 such that A052180(primepi(p)) = 5.

23, 31, 53, 61, 83, 151, 173, 233, 263, 271, 331, 353, 383, 443, 503, 541, 563, 571, 593, 601, 653, 751, 991, 1013, 1103, 1223, 1231, 1283, 1291, 1321, 1433, 1493, 1553, 1613, 1621, 1741, 1861, 1973, 2011, 2063, 2131, 2281, 2333, 2341, 2371, 2393, 2543

Offset

1,1

Links

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

Maple

filter:= proc(p) local t, m, flag;
  flag:= false;
  for t from p+1 to p+5 do
    m:= min(numtheory:-factorset(t));
    if m > 5 then return false
    elif m = 5 then flag:= true
    fi
  od;
  flag
end proc:
Res:= NULL: count:= 0:
q:= 1: p:= 2:
while count < 100 do
  q:= p;
  p:= nextprime(p);
  if p-q = 6 and filter(q) then
    count:= count+1; Res:= Res, q;
  fi
od:
Res; # Robert Israel, Aug 12 2018

Crossrefs

Cf. A031924, A031925, A052180.

Sequence in context: A086547 A054291 A261086 * A177981 A064792 A030670

Adjacent sequences: A052227 A052228 A052229 * A052231 A052232 A052233

Keyword

nonn

Author

Labos Elemer, Feb 01 2000

Status

approved