id:A140390 - OEIS Search Results

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Nonprimes of the form 21k+1.

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1, 22, 64, 85, 106, 148, 169, 190, 232, 253, 274, 295, 316, 358, 400, 442, 484, 505, 526, 568, 589, 610, 652, 694, 715, 736, 778, 799, 820, 841, 862, 904, 925, 946, 988, 1030, 1072, 1114, 1135, 1156, 1177, 1198, 1219, 1240, 1261, 1282, 1324 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`The prime numbers 421=2021+1 and 673=3221+1, for example, are neither in here nor in A136069.`
	CROSSREFS	`Cf. A136069.` `Sequence in context: A044505 A156797 A051874 this_sequence A069178 A081929 A124715` `Adjacent sequences: A140387 A140388 A140389 this_sequence A140391 A140392 A140393`
	KEYWORD	`nonn,less`
	AUTHOR	`Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jun 12 2008`
	EXTENSIONS	`Edited by R. J. Mathar, Jun 17 2008`

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

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