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A261823
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Minimal nested palindromic primes with seed 6.
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2
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6, 10601, 3106013, 19310601391, 3193106013913, 30319310601391303, 3303193106013913033, 333031931060139130333, 33330319310601391303333, 303333031931060139130333303, 1130333303193106013913033330311, 19113033330319310601391303333031191
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OFFSET
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1,1
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COMMENTS
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Let s be a palindrome and put a(1) = s. Let a(2) be the least palindromic prime having s in the middle; for n > 2, let a(n) be the least palindromic prime have a(n-1) in the middle. Then (a(n)) is the sequence of minimal nested palindromic primes with seed s.
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LINKS
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EXAMPLE
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As a triangle:
........6
......10601
.....3106013
...19310601391
..3193106013913
30319310601391303
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MATHEMATICA
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s = {6}; Do[NestWhile[# + 1 &, 1, ! PrimeQ[tmp = FromDigits[Join[#, IntegerDigits[Last[s]], Reverse[#]] &[IntegerDigits[#]]]] &]; AppendTo[s, tmp], {15}]; s
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CROSSREFS
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Cf. A261881 (seed 0, with guide to related sequences).
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KEYWORD
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nonn,easy,base
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AUTHOR
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STATUS
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approved
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