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A074857
Primes p such that all p-pal for p/2 < pal < p are composite, where pal is a palindrome.
0
2, 17, 19, 23, 31, 37, 43, 53, 59, 137, 139, 151, 157, 179, 181, 191, 197, 199, 211, 307, 317, 337, 347, 367, 397, 599, 1423, 1433, 1453, 1483, 1493, 1523, 1543, 1583, 1613, 1693, 1723, 1733, 1753, 1759, 1777, 1783, 1787, 1789, 1801, 1811, 1823, 1831, 1847
OFFSET
1,1
EXAMPLE
59 is in the sequence because the palindromes between 29 and 59 are 33,44,55 and 59-55 = 4, 59-44 = 15, 59-33 = 26, all composite.
CROSSREFS
Sequence in context: A106849 A064697 A038980 * A191018 A133247 A216965
KEYWORD
base,nonn
AUTHOR
Jason Earls, Sep 11 2002
STATUS
approved