id:A109369 - OEIS Search Results

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Numbers n such that the string 33n is prime.

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1, 7, 13, 19, 23, 29, 31, 43, 47, 59, 61, 71, 73, 89, 91, 107, 113, 119, 149, 151, 161, 179, 181, 191, 199, 203, 211, 223, 247, 287, 289, 301, 311, 317, 329, 331, 343, 347, 349, 353, 359, 377, 391, 403, 409, 413, 427, 457, 461, 469, 479, 487, 493, 503, 521, 529 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`If n=1 then 33n = 331 (prime).` `If n=59 then 33n = 3359 (prime).`
	MAPLE	`a:=proc(n) if isprime(33*10^nops(convert(n, base, 10))+n)=true then n else fi end: seq(a(n), n=0..600); (Deutsch)`
	CROSSREFS	`Sequence in context: A007921 A092409 A124095 this_sequence A088982 A033561 A049591` `Adjacent sequences: A109366 A109367 A109368 this_sequence A109370 A109371 A109372`
	KEYWORD	`nonn,base`
	AUTHOR	`Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Aug 24 2005`
	EXTENSIONS	`More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Sep 02 2005`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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