A019527 - OEIS

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A019527

Poincare series for depths of roots in a certain root system.

4, 4, 5, 6, 8, 11, 15, 21, 30, 43, 62 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	REFERENCES	`Posting to sci.math.research by dima(AT)win.tue.nl (Dmitrii V. Pasechnik), Oct 28 1996.`
	FORMULA	`a(n)=2a(n-1)-a(n-2)+a(n-3)-a(n-4) (for n>5).`
	CROSSREFS	`Sequence in context: A120197 A085581 A137902 * A062836 A137903 A091349` `Adjacent sequences: A019524 A019525 A019526 * A019528 A019529 A019530`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com)`

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Last modified February 17 07:41 EST 2012. Contains 205998 sequences.