A164125 First differences of A029971.

11, 10, 128, 22, 60, 524, 180, 156, 156, 180, 58, 180, 66, 90, 90, 66, 90, 6320, 714, 1008, 2190, 2650, 1722, 198, 1722, 41510, 810, 594, 1620, 6570, 3546, 5736, 1620, 1404, 810, 594, 1620, 522, 4428, 810, 1332, 1620, 1404, 7356, 594, 810, 3546, 2214

Offset: 1

Author

Vladimir Joseph Stephan Orlovsky, Aug 10 2009

Keywords

• nonn
• base

Comments

Differences between primes that are palindromic in base 3.

Examples

			a(4) = 22 = A029971(5)-A029971(4).
		

Crossrefs

Cf. A164124, A029971, A016041

Programs

Mathematica

f[n_]:=FromDigits[RealDigits[n,3][[1]]]==FromDigits[Reverse[RealDigits[n, 3][[1]]]]; a=2;lst={};Do[p=Prime[n];If[f[p],AppendTo[lst,p-a];a=p], {n,1,8!,1}];lst

Extensions

Definition simplified, initial 0 removed by R. J. Mathar, Nov 17 2009