id:A061346 - OEIS Search Results

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Odd numbers that are neither primes nor prime powers.

+0
4

15, 21, 33, 35, 39, 45, 51, 55, 57, 63, 65, 69, 75, 77, 85, 87, 91, 93, 95, 99, 105, 111, 115, 117, 119, 123, 129, 133, 135, 141, 143, 145, 147, 153, 155, 159, 161, 165, 171, 175, 177, 183, 185, 187, 189, 195, 201, 203, 205, 207, 209, 213, 215, 217, 219, 221 (list; graph; listen)

	OFFSET	`0,1`
	COMMENT	`Odd leg of more than one primitive Pythagorean triangles. For smallest odd leg common to 2^n PPTs, see A070826. - Lekraj Beedassy (blekraj(AT)yahoo.com), Jul 12 2006`
	PROGRAM	`(ARIBAS): for k := 3 to 253 by 2 do ar := factorlist(k); if ar[0] < ar[length(ar)-1] then write(k, " ") end; end;`
	CROSSREFS	`Cf. A061345.` `Sequence in context: A047200 A070537 A070005 this_sequence A046388 A098905 A024556` `Adjacent sequences: A061343 A061344 A061345 this_sequence A061347 A061348 A061349`
	KEYWORD	`nonn,easy`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Jun 08 2001`
	EXTENSIONS	`More terms from Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Jun 10 2001`

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Last modified December 1 13:27 EST 2009. Contains 167806 sequences.

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