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A164125 First differences of A029971. 2
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Differences between primes that are palindromic in base 3.

LINKS

Table of n, a(n) for n=1..48.

EXAMPLE

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

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

CROSSREFS

Cf. A164124, A029971, A016041

Sequence in context: A070836 A063432 A038324 * A212529 A004289 A287710

Adjacent sequences:  A164122 A164123 A164124 * A164126 A164127 A164128

KEYWORD

nonn,base

AUTHOR

Vladimir Joseph Stephan Orlovsky, Aug 10 2009

EXTENSIONS

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

STATUS

approved

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Last modified September 19 15:31 EDT 2019. Contains 327199 sequences. (Running on oeis4.)