A229781 Common difference in sets of 3 consecutive palindromic primes (palprimes) in arithmetic progression.

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

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 A332231

Adjacent sequences: A229778 A229779 A229780 * A229782 A229783 A229784

Keyword

nonn,base

Author

Shyam Sunder Gupta, Sep 29 2013

Status

approved