id:A078095 - OEIS Search Results

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Numbers n such that Omega(n)=Omega(n-1)+ Omega(n-2)+ Omega(n-3)+ Omega(n-4). (Omega(n) denotes the number of prime factors of n, counting multiplicity).

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1440, 2560, 2880, 3456, 3584, 5760, 6720, 7168, 8192, 8448, 9600, 10080, 10368, 10800, 12150, 12480, 13440, 14000, 15120, 18144, 21120, 21384, 22400, 25088, 25920, 26880, 28320, 30240, 31104, 31680, 34992, 35840, 38400, 39168, 39366 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(1)=1440 is a term because Omega(1440)=8=Omega(1439)+Omega(1438)+Omega(1437)+Omega(1436)=1+2+2+3=8`
	CROSSREFS	`Cf. A001222.` `Sequence in context: A081426 A101998 A063846 this_sequence A157508 A061221 A023102` `Adjacent sequences: A078092 A078093 A078094 this_sequence A078096 A078097 A078098`
	KEYWORD	`nonn`
	AUTHOR	`Shyam Sunder Gupta (guptass(AT)rediffmail.com), Dec 01 2002`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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