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A081150 Number of even cycles in range [A014137(n-1)..A014138(n-1)] of permutation A057505/A057506. 7
0, 0, 1, 1, 3, 6, 18, 37, 95, 212, 528, 1226, 2936, 6822, 16212, 38081, 90717, 215414, 516358 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

COMMENTS

For the convenience of the range notation above, we define A014137(-1) and A014138(-1) as zero.

LINKS

Table of n, a(n) for n=0..18.

Counted with the help of this C-program

CROSSREFS

a(n) = A081157(n)+A081160(n)+A081162(n) = A057507(n)-A081148(n). Bisections: A081151, A081152.

Sequence in context: A268529 A026532 A160505 * A216813 A181037 A222856

Adjacent sequences:  A081147 A081148 A081149 * A081151 A081152 A081153

KEYWORD

nonn

AUTHOR

Wouter Meeussen & Antti Karttunen Mar 10 2003

STATUS

approved

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Last modified February 24 08:10 EST 2020. Contains 332200 sequences. (Running on oeis4.)