A229782 Common difference in sets of 4 consecutive palindromic primes (palprimes) in arithmetic progression.

3000, 30000, 81000, 30000, 81000, 810000, 810000, 1110000, 1110000, 810000, 300000, 300000, 810000, 1920000, 810000, 300000, 300000, 300000, 300000, 300000, 1110000, 8100000, 8100000, 11100000, 8100000, 8100000, 3000000, 11100000, 8100000, 8100000, 8100000

Offset

1,1

Links

Table of n, a(n) for n=1..31.

Example

a(2)=30000 since (159202951, 159232951, 159262951, 159292951) is the second arithmetic progression of 4 consecutive palindromic primes with common difference = 30000.

Crossrefs

Cf. A059121.

Sequence in context: A329169 A236982 A202097 * A269885 A269764 A156655

Adjacent sequences: A229779 A229780 A229781 * A229783 A229784 A229785

Keyword

nonn,base

Author

Shyam Sunder Gupta, Sep 29 2013

Status

approved