id:A065437 - OEIS Search Results

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Smallest base relative to which the n-th prime is palindromic.

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3, 2, 2, 2, 10, 3, 2, 18, 3, 4, 2, 6, 5, 6, 46, 52, 4, 6, 5, 7, 2, 78, 5, 8, 8, 10, 102, 2, 5, 8, 2, 10, 136, 138, 148, 3, 7, 162, 166, 3, 178, 10, 6, 12, 6, 11, 8, 222, 8, 12, 3, 14, 12, 8, 2, 262, 268, 7, 11, 14, 282, 292, 7, 310, 2, 316, 15, 9, 346, 8, 10, 358, 366, 4, 13, 10, 388 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Subset of A016026 for primes only.`
	LINKS	`Eric Weisstein's World of Mathematics, Palindromic Primes`
	EXAMPLE	`71 is the 20-th prime and can be written as 131 in base 7, hence a(20)=7`
	MATHEMATICA	`PrimeMinBase[ n_ ] := NestWhile[ # + 1 &, 2, IntegerDigits[ Prime[ n ], # ] != Reverse[ IntegerDigits[ Prime[ n ], # ] ] & ]`
	CROSSREFS	`Cf. A016026.` `Sequence in context: A130845 A134653 A090207 this_sequence A097721 A073756 A006379` `Adjacent sequences: A065434 A065435 A065436 this_sequence A065438 A065439 A065440`
	KEYWORD	`base,easy,nonn`
	AUTHOR	`Peter Bertok (peter(AT)bertok.com), Nov 23 2001`

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Last modified December 9 14:43 EST 2009. Contains 170430 sequences.

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