id:A117752 - OEIS Search Results

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Number of prime 3-digit palindromes in base n.

+0
1

2, 2, 3, 5, 6, 6, 13, 13, 15, 21, 20, 26, 25, 30, 36, 30, 37, 44, 50, 42, 59, 60, 61, 71, 75, 68, 89, 93, 109, 100, 111, 113, 118, 120, 133, 134, 142, 155, 162, 154, 166, 168, 187, 194, 220, 195, 207, 212, 235, 210, 243, 263, 247, 257, 293, 286, 296, 320, 304, 328 (list; graph; listen)

	OFFSET	`2,1`
	COMMENT	`Is there a proof that a(n) > 0?`
	PROGRAM	`(PARI) a(n)=local(t, i, j); t=0; for(i=1, n-1, for(j=0, n-1, if(isprime(i(n^2+1)+jn), t++))); t`
	CROSSREFS	`Cf. A060873.` `Sequence in context: A051732 A098382 A098180 this_sequence A006065 A096981 A035541` `Adjacent sequences: A117749 A117750 A117751 this_sequence A117753 A117754 A117755`
	KEYWORD	`base,nonn`
	AUTHOR	`Frank Adams-Watters (FrankTAW(AT)Netscape.net), Apr 14 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

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