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A067899 Fractal palindromic primes of second order. 1

%I #12 Jan 12 2024 20:29:12

%S 3135313,3732373,3836383,7276727,7278727,7576757,7873787,7977797,

%T 11311511311,11411311411,13331113331,13331713331,13831913831,

%U 13931413931,17471317471,19391319391,31513531513,31513831513,31513931513,37273937273,37573237573,37573337573

%N Fractal palindromic primes of second order.

%H Sean A. Irvine, <a href="/A067899/b067899.txt">Table of n, a(n) for n = 1..1000</a>

%e 11411311411 is a palindromic prime in the sequence because about the middle 3, either wing 11411 is itself a palindromic prime, further made up, about a middle 4, of wings 11, another palindromic prime.

%Y Cf. A082584, A082599.

%K base,nonn

%O 1,1

%A _Lekraj Beedassy_, May 13 2003

%E a(11) onward corrected by _Sean A. Irvine_, Jan 12 2024

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Last modified July 12 17:07 EDT 2024. Contains 374251 sequences. (Running on oeis4.)