id:A118118 - OEIS Search Results

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Sequence of composite numbers that remain composite even when a single digit of the number is changed.

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200, 204, 206, 208, 320, 322, 324, 325, 326, 328, 510, 512, 514, 515, 516, 518, 530, 532, 534, 535, 536, 538, 620, 622, 624, 625, 626, 628, 840, 842, 844, 845, 846, 848, 890, 892, 894, 895, 896, 898, 1070, 1072, 1074, 1075, 1076, 1078, 1130 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(1) = 200 is in the sequence because changing any digit of 200 (for example 300, 220, or 209) is still composite. The integer 100 is not in the sequence because it can be changed to 107 which is prime.`
	CROSSREFS	`Sequence in context: A094220 A035881 A114984 this_sequence A124472 A078492 A004966` `Adjacent sequences: A118115 A118116 A118117 this_sequence A118119 A118120 A118121`
	KEYWORD	`easy,nonn`
	AUTHOR	`Adam Panagos (adam.panagos(AT)gmail.com), May 12 2006`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research