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A056730 Palindromic primes with just two distinct digits. 2
101, 131, 151, 181, 191, 313, 353, 373, 383, 727, 757, 787, 797, 919, 929, 11311, 11411, 13331, 15551, 16661, 18181, 19991, 32323, 33533, 35353, 72227, 72727, 74747, 75557, 76667, 77377, 77477, 77977, 78787, 78887, 79997, 94949, 95959 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..38.

MATHEMATICA

Select[ Range[ 1, 3 10^6, 2 ], PrimeQ[ # ] && Length[ Union[ RealDigits[ # ][ [ 1 ] ] ] ] == 2 && RealDigits[ # ][ [ 1 ] ] == Reverse[ RealDigits[ # ][ [ 1 ] ] ] & ]

CROSSREFS

Sequence in context: A075793 A052086 A154270 * A077798 A089360 A056728

Adjacent sequences:  A056727 A056728 A056729 * A056731 A056732 A056733

KEYWORD

nonn,base

AUTHOR

Robert G. Wilson v, Aug 11 2000

STATUS

approved

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Last modified September 23 21:30 EDT 2017. Contains 292392 sequences.