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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..39.

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 A274389

Adjacent sequences:  A229778 A229779 A229780 * A229782 A229783 A229784

KEYWORD

nonn,base

AUTHOR

Shyam Sunder Gupta, Sep 29 2013

STATUS

approved

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Last modified April 20 16:17 EDT 2019. Contains 322310 sequences. (Running on oeis4.)