15144960

Appears in sequences

• a(n) = A027144(2n-1, n-1).at n=10A027148
• a(n) = A027144(n, floor(n/2)).at n=21A027150
• Number of permutations of length 2n satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..2n, with k=3, r=3, I={-2,0,1,2}. There is no one such permutation of length 2n+1.at n=27A079980
• Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=3, r=3, I={-2,0,1,2}.at n=54A079981