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Number of odd cycles in range [A014137(n-1)..A014138(n-1)] of permutation A057505/A057506.
5

%I #13 Jan 11 2024 06:33:10

%S 1,1,0,1,0,4,0,9,0,24,0,62,0,162,0,447,0,1234,0

%N Number of odd cycles in range [A014137(n-1)..A014138(n-1)] of permutation A057505/A057506.

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

%H Antti Karttunen, <a href="/A089408/a089408.c.txt">Counted with the help of this C program</a>.

%F a(n) = A081153(n) + A081155(n) = A057507(n) - A081150(n).

%Y Bisection: A081149.

%Y Cf. A081153, A081155, A057507, A081150.

%Y Cf. A014137, A014138, A057505, A057506.

%K nonn,more

%O 0,6

%A _Wouter Meeussen_ and _Antti Karttunen_, Mar 10 2003