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A229781
Common difference in sets of 3 consecutive palindromic primes (palprimes) in arithmetic progression.
0
2, 30, 810, 300, 300, 3000, 3000, 3000, 3000, 3000, 8100, 3000, 3000, 3000, 81000, 30000, 30000, 30000, 81000, 111000, 30000, 30000, 30000, 30000, 81000, 111000, 30000, 30000, 30000, 81000, 111000, 30000, 30000, 30000, 111000, 30000, 141000, 81000, 81000
OFFSET
1,1
EXAMPLE
a(2)=30 since (727, 757, 787) is the second arithmetic progression of 3 consecutive palindromic primes with common difference = 30.
CROSSREFS
Cf. A059120.
Sequence in context: A278884 A013525 A270531 * A114938 A082653 A332231
KEYWORD
nonn,base
AUTHOR
Shyam Sunder Gupta, Sep 29 2013
STATUS
approved