A081155 - OEIS

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A081155

Number of odd cycles in range [A014137(n-1)..A014138(n-1)] of permutation A057505/A057506, with fixed-points of both A057163 and A057164.

1, 1, 0, 1, 0, 2, 0, 3, 0, 6, 0, 12, 0, 20, 0, 59, 0, 120, 0 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,6`
	COMMENTS	`See comment at A080973. Because A057163 can fix only binary trees of odd size, the even-indexed terms are all 0 after n>0.`
	CROSSREFS	`a(n) = A081148(n)-A081153(n). Bisection: A081156.` `Sequence in context: A117175 A090482 A082857 * A130628 A076563 A163974` `Adjacent sequences: A081152 A081153 A081154 * A081156 A081157 A081158`
	KEYWORD	`nonn`
	AUTHOR	`Wouter Meeussen (wouter.meeussen(AT)pandora.be) and Antti Karttunen (Firstname.Surname(AT)iki.fi) Mar 10 2003`

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Last modified February 16 23:43 EST 2012. Contains 205978 sequences.