A097280 - OEIS

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A097280

Perimeter of integer triangle [A001611(n), A001611(n+1), A001611(n+2)].

5, 7, 9, 13, 19, 29, 45, 71, 113, 181, 291, 469, 757, 1223, 1977, 3197, 5171, 8365, 13533, 21895, 35425, 57317, 92739, 150053, 242789, 392839, 635625, 1028461, 1664083, 2692541, 4356621, 7049159, 11405777, 18454933, 29860707, 48315637 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	COMMENTS	`a(n) = 2A001611(n+2) + 1;` `a(n) = a(n-1) + 2A000045(n).`
	FORMULA	`a(n) = A001611(n) + A001611(n+1) + A001611(n+2).`
	MATHEMATICA	`Fibonacci[Range[2, 5! ]]*2+3 [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Mar 19 2010]`
	CROSSREFS	`Cf. A097281.` `Sequence in context: A050550 A079523 A039504 * A155732 A029606 A050595` `Adjacent sequences: A097277 A097278 A097279 * A097281 A097282 A097283`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 04 2004`
	EXTENSIONS	`Corrected by T. D. Noe (noe(AT)sspectra.com), Oct 25 2006`

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Last modified February 17 19:13 EST 2012. Contains 206085 sequences.