id:A101553 - OEIS Search Results

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A modular recurrence.

+0
2

1, 5, 15, 75, 225, 1125, 3375, 16875, 50625, 253125, 759375, 3796875, 11390625, 56953125, 170859375, 854296875, 2562890625, 12814453125, 38443359375, 192216796875, 576650390625, 2883251953125, 8649755859375, 43248779296875 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Interpolated zeros suppressed.`
	FORMULA	`a(0)=1, a(1)=0, a(n)=(3+2mod(n/2, 2))a(n-2). a(n)=A100747(2(n+1))/3.` `a(2n) = 15^n, a(2n+1) = 515^n. - Ralf Stephan, May 16 2007`
	CROSSREFS	`Sequence in context: A019045 A066886 A079569 this_sequence A032122 A064678 A088935` `Adjacent sequences: A101550 A101551 A101552 this_sequence A101554 A101555 A101556`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Dec 06 2004`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research