23947

Appears in sequences

• Number of partitions satisfying (cn(2,5) = cn(3,5) and cn(0,5) <= cn(1,5) and cn(0,5) <= cn(4,5)).at n=52A036805
• Partial sums of A084570.at n=26A084569
• Numbers k such that A118255(k) is prime.at n=21A118257
• Triangle T(n,k) read by rows: number of permutations in [n] with exactly k ascents that have an even number of inversions.at n=47A128612
• Triangle T(n,k) read by rows: number of permutations in [n] with exactly k ascents that have an odd number of inversions.at n=52A128613
• Triangle read by rows: T(n,k) is the number of even permutations of {1,2,...,n} having k descents (n >= 1, k >= 0).at n=48A145882
• Triangle read by rows: T(n,k) is the number of odd permutations of {1,2,...,n} having k descents. (n>=1, k>=1).at n=34A145883
• E.g.f. satisfies: A(x) = (1 + sin(x*A(x))) / cos(x*A(x)).at n=6A290579