id:A075296 - OEIS Search Results

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Interprimes which are of the form s*prime, s=21.

+0
21

42, 105, 231, 399, 483, 861, 987, 1113, 1281, 1491, 1869, 2121, 2247, 2667, 2751, 3129, 3423, 5649, 5691, 5817, 7539, 8169, 8421, 8589, 9807, 10563, 10689, 10983, 11361, 13881, 14511, 14889, 15519, 17031, 17409, 18627, 19761, 20391, 21189 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Interprimes of the form s*prime are in A075277-A075296 ( s = 2 - 21 ). Case s=1 is impossible.`
	EXAMPLE	`231 is an interprime and 231/21 = 11 is prime.`
	MATHEMATICA	`s=21; Select[Table[(Prime[n+1]+Prime[n])/2, {n, 2, 14000}], PrimeQ[ #/s]&]`
	CROSSREFS	`Cf. A075277-A075296.` `Adjacent sequences: A075293 A075294 A075295 this_sequence A075297 A075298 A075299` `Sequence in context: A044561 A063329 A039470 this_sequence A023716 A045148 A045040`
	KEYWORD	`easy,nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Sep 12 2002`

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Last modified May 16 23:01 EDT 2008. Contains 139884 sequences.

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