id:A121387 - OEIS Search Results

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Semiprimes p*q with p and q primes of the form 4k+1 (A002144).

+0
4

25, 65, 85, 145, 169, 185, 205, 221, 265, 289, 305, 365, 377, 445, 481, 485, 493, 505, 533, 545, 565, 629, 685, 689, 697, 745, 785, 793, 841, 865, 901, 905, 949, 965, 985, 1037, 1073, 1145, 1157, 1165, 1189, 1205, 1241, 1261, 1285, 1313, 1345, 1369, 1385, 1405, 1417 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..1000`
	EXAMPLE	`65 = 5 * 13` `5 mod 4 = 1` `13 mod 4 = 1` `so the second term of A121387 is 65`
	CROSSREFS	`Fifth diagonal of A121388.` `Cf. A107978 A080774 A108181 A121388.` `Adjacent sequences: A121384 A121385 A121386 this_sequence A121388 A121389 A121390` `Sequence in context: A061970 A120961 A050993 this_sequence A039376 A043199 A043979`
	KEYWORD	`easy,nonn`
	AUTHOR	`Alford Arnold (Alford1940(AT)aol.com), Jul 26 2006, corrected Jun 24 2007`
	EXTENSIONS	`Better definition from T. D. Noe, Sep 25 2007`

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Last modified October 12 11:54 EDT 2008. Contains 144829 sequences.

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