A060301 - OEIS

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A060301

For n>3: a(n) is a multiple of three distinct earlier terms.

2, 3, 5, 30, 180, 300, 450, 1080, 1800, 2700, 3000, 4500, 6480, 6750, 10800, 16200, 18000, 27000, 30000, 38880, 40500, 45000, 64800, 67500, 97200, 101250, 108000, 162000, 180000, 233280, 243000, 270000, 300000, 388800, 405000, 450000, 583200 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	LINKS	`Table of n, a(n) for n=1..37.`
	FORMULA	`a(n) is of the form 2^b3^c5^d where either b+c+d=1, or where each of b, c and d are positive and the largest of the three is an odd number less than the sum of the other two. For n>3: a(n) is 30 times a power of 6 times a power of 10 times a power of 15.`
	EXAMPLE	`a(15)=10800=230180=a(1)a(4)a(5)`
	CROSSREFS	`Cf. A000423.` `Sequence in context: A110389 A083388 A090475 * A040119 A186635 A265807` `Adjacent sequences: A060298 A060299 A060300 * A060302 A060303 A060304`
	KEYWORD	`nonn`
	AUTHOR	`Henry Bottomley, Mar 28 2001`
	STATUS	`approved`

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Last modified January 12 15:31 EST 2017. Contains 280653 sequences.