id:A142863 - OEIS Search Results

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Semiprimes n (A001358) for which A000001(n) is 2.

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4, 6, 9, 10, 14, 21, 22, 25, 26, 34, 38, 39, 46, 49, 55, 57, 58, 62, 74, 82, 86, 93, 94, 106, 111, 118, 121, 122, 129, 134, 142, 146, 155, 158, 166, 169, 178, 183, 194, 201, 202, 203, 205, 206, 214, 218, 219, 226, 237, 253, 254, 262, 274, 278, 289, 291, 298, 301 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Semiprimes p^2 or pq with p<q and gcd(p,q-1)=p. - T. D. Noe, Oct 08 2008`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..1000` `John H. Conway, Heiko Dietrich and E. A. O'Brien, Counting groups: gnus, moas and other exotica.`
	CROSSREFS	`Sequence in context: A115652 A084759 A054395 this_sequence A132435 A108631 A099303` `Adjacent sequences: A142860 A142861 A142862 this_sequence A142864 A142865 A142866`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Oct 03 2008`
	EXTENSIONS	`More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 04 2008`

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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.

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