id:A117574 - OEIS Search Results

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Total number of permutations P of {1,2,3,...,n} such that |P(i+3) - P(i)| is not equal to 3 for 1 <= i <= n-3.

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1, 2, 6, 20, 80, 384, 2240, 15424, 123456, 1110928, 11287232, 127016304, 1565107248, 20935873872, 301974271248, 4669727780624 (list; graph; listen)

	OFFSET	`1,2`
	REFERENCES	`Roberto Tauraso, The Dinner Table Problem: The Rectangular Case, INTEGERS, vol. 6 (2006), paper A11`
	FORMULA	`Formula given in Tauraso reference`
	CROSSREFS	`Sequence in context: A027221 A144168 A108124 this_sequence A115084 A089179 A004104` `Adjacent sequences: A117571 A117572 A117573 this_sequence A117575 A117576 A117577`
	KEYWORD	`nonn`
	AUTHOR	`James A. Sellers (sellersj(AT)math.psu.edu), Apr 27 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.