55674

Appears in sequences

• Number of permutations of length n by rises.at n=5A001278
• Irregular triangle read by rows: T(n,k) (n>=1, 0 <= k <= floor(n/2)) = number of permutations of 1..n with exactly floor(n/2) - k runs of consecutive pairs up.at n=26A010029
• Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k maximal strings of increasing consecutive integers (0<=k<=floor(n/2)).at n=27A136123
• Meandric numbers for a river crossing up to 3 parallel roads at n points.at n=13A204352
• Number of 3 X n 0..2 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.at n=10A224001
• Number of (n+2) X 8 0..1 matrices with each 3 X 3 subblock idempotent.at n=17A224557
• Number of length 3+1 0..n arrays with the sum of the minimum of each adjacent pair multiplied by some arrangement of +-1 equal to zero.at n=28A250420