A136098 Prime palindromic cyclops numbers.

101, 16061, 31013, 35053, 38083, 73037, 74047, 91019, 94049, 1120211, 1150511, 1160611, 1180811, 1190911, 1250521, 1280821, 1360631, 1390931, 1490941, 1520251, 1550551, 1580851, 1630361, 1640461, 1660661, 1670761, 1730371

Offset

1,1

Comments

Prime entries of A138131.

Links

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

Maple

f:= proc(n, d) local L, m, k, p;
  L:= convert(9^d+n, base, 9);
  p:= add((1+L[d+1-i])*(10^(i-1)+10^(2*d+1-i)), i=1..d);
  if isprime(p) then p fi;
end proc:
[seq(seq(f(i, d), i=0..9^d-1), d=1..3)]; # Robert Israel, Feb 18 2018

Crossrefs

Cf. A082435, A138131, A134808, A134809.

Sequence in context: A185893 A156669 A082435 * A153807 A327741 A183056

Adjacent sequences: A136095 A136096 A136097 * A136099 A136100 A136101

Keyword

nonn,base

Author

Lekraj Beedassy, Mar 15 2008

Status

approved