A120534 - OEIS

This site is supported by donations to The OEIS Foundation.

A120534

Untouchable 3-almost primes.

52, 124, 188, 238, 246, 268, 290, 292, 322, 406, 426, 430, 474, 498, 518, 530, 556, 628, 658, 668, 670, 782, 892, 894, 902, 964, 1002, 1028, 1074, 1102, 1146, 1162, 1222, 1246, 1258, 1266, 1342, 1348, 1388, 1398, 1406, 1506, 1510, 1542, 1578, 1588, 1682, 1732, 1758, 1842, 1844, 1852 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`Numbers having 3 prime factors (with multiplicity) and which are not the sum of the aliquot parts of any number. 3-almost prime analogue of A119379 Untouchable semiprimes: semiprimes which are not the sum of the aliquot parts of any number. 2 and 5 are almost surely the only untouchable primes.`
	FORMULA	`A005114 intersect A014612.`
	CROSSREFS	`Cf. A005114, A014612, A119379.` `Sequence in context: A044522 A044239 A044620 * A122166 A176143 A205221` `Adjacent sequences: A120531 A120532 A120533 * A120535 A120536 A120537`
	KEYWORD	`nonn`
	AUTHOR	`Jonathan Vos Post (jvospost3(AT)gmail.com), Aug 06 2006`

Content is available under The OEIS End-User License Agreement .

Last modified February 17 12:38 EST 2012. Contains 206021 sequences.