id:A087434 - OEIS Search Results

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Number of brilliant numbers whose prime factors each have n digits.

+0
3

10, 231, 10296, 563391, 34974066, 2374052871, 171745762321, 12989075028126, 1016377282340160, 81690831917887753, 6708792934060150753, 560785267822390134615, 47573053155260626453431 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Number of brilliant numbers having 2n or 2n-1 digits.`
	FORMULA	`a(n)=A000217(A006879(n)).`
	CROSSREFS	`Cf. A006879, A006880, A078972, A086846, A087435.` `Sequence in context: A004702 A027952 A056602 this_sequence A012240 A096331 A159497` `Adjacent sequences: A087431 A087432 A087433 this_sequence A087435 A087436 A087437`
	KEYWORD	`nonn,base`
	AUTHOR	`Ray Chandler (rayjchandler(AT)sbcglobal.net), Sep 02 2003`
	EXTENSIONS	`a(14) from Ray Chandler (rayjchandler(AT)sbcglobal.net), Jul 21 2005`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research