Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #6 May 01 2014 02:48:29
%S 1,1,1,2,3,10,18,46,95,236,528,1288,2936,6984,16212,38528,90717,
%T 216648,516358,1240818,2979992
%N Number of 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 A. Karttunen, <a href="/A089408/a089408.c.txt">C-program for computing the initial terms of this sequence</a>
%Y a(n) = A081148(n)+A081150(n). Bisections: A081151, A081167. Cf. A057545, A060114, A081164.
%Y Occurs for first time in A073201 as row 2614.
%K nonn,more
%O 0,4
%A _Antti Karttunen_, Sep 03 2000