id:A063479 - OEIS Search Results

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Omega(n+1)=2*omega(n), where omega is the number of distinct prime divisors.

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5, 9, 11, 13, 17, 19, 23, 25, 27, 32, 37, 43, 47, 49, 53, 61, 64, 67, 71, 73, 79, 81, 97, 103, 107, 121, 128, 151, 157, 163, 191, 193, 199, 209, 211, 223, 241, 243, 271, 277, 283, 313, 329, 331, 337, 343, 361, 367, 383, 397, 421, 431, 457, 463, 487, 499, 512 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`omega(209)=2, omega(209+1)=2*2, so 209 is a member of the sequence.`
	PROGRAM	`(PARI) j=[]; for(n=1, 700, if(omega(n+1)==2*omega(n), j=concat(j, n))); j`
	CROSSREFS	`Sequence in context: A043749 A043757 A043766 this_sequence A078621 A076195 A128310` `Adjacent sequences: A063476 A063477 A063478 this_sequence A063480 A063481 A063482`
	KEYWORD	`easy,nonn`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Jul 28 2001`

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Last modified August 28 19:25 EDT 2008. Contains 143183 sequences.

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