A133207 Strobogrammatic non-palindromic primes.

619, 16091, 19861, 61819, 116911, 119611, 160091, 169691, 191161, 196961, 686989, 688889, 1068901, 1160911, 1190611, 1191611, 1681891, 1690691, 1898681, 1908061, 1960961, 1990661, 6081809, 6100019, 6108019, 6110119, 6608099, 6610199

Offset

1,1

Comments

Primes which are invariant under a 180-degree rotation, but do not have a mirror symmetry.

Links

Table of n, a(n) for n=1..28.

Mathematica

Select[Range[10000000], PrimeQ[ # ] && Union[IntegerDigits[ # ], {0, 1, 6, 8, 9}] == {0, 1, 6, 8, 9} && Reverse[IntegerDigits[ # ] /. {6 -> 9, 9 -> 6} ] == IntegerDigits[ # ] && Reverse[IntegerDigits[ # ]] != IntegerDigits[ # ] &]

Crossrefs

Cf. The elements of this sequence are the elements of A007597 (Strobogrammatic primes) excluding the elements of A068188 (Tetradic primes).

Sequence in context: A210887 A118467 A200812 * A182351 A335961 A202239

Adjacent sequences: A133204 A133205 A133206 * A133208 A133209 A133210

Keyword

base,nonn

Author

Tanya Khovanova, Oct 10 2007

Status

approved