id:A084159 - OEIS Search Results

Search: id:A084159

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Pell oblongs.

+0
8

1, 3, 21, 119, 697, 4059, 23661, 137903, 803761, 4684659, 27304197, 159140519, 927538921, 5406093003, 31509019101, 183648021599, 1070379110497, 6238626641379, 36361380737781, 211929657785303, 1235216565974041 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`a(n)=A001333(n)*A001333(n+1).`
	FORMULA	`a(n)=((sqrt(2)+1)^(2n+1)-(sqrt(2)-1)^(2n+1)+2(-1)^n)/4.` `a(n)=5a(n-1)+5a(n-2)-a(n-3). - Paul Curtz (bpcrtz(AT)free.fr), May 17 2008`
	CROSSREFS	`Cf. A084158, A084175, A001654. Essentially the same as A046727.` `Sequence in context: A005057 A092634 A046727 this_sequence A117512 A068127 A004658` `Adjacent sequences: A084156 A084157 A084158 this_sequence A084160 A084161 A084162`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), May 18 2003`

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

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