22818

Appears in sequences

• a(n) = C(n,8) + C(n,7) + C(n,6) + C(n,5) + C(n,4) + C(n,3) + C(n,2) + C(n,1).at n=15A116690
• Total sum A(n,k) of the k-th powers of lengths of ascending runs in all permutations of [n]; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=51A229001
• Total sum of cubed lengths of ascending runs in all permutations of [n].at n=6A229003
• Numbers n such that n^2 is a sum of 2 and also of 4 consecutive primes.at n=21A252066
• Row sums of A257241, Stifel's version of the arithmetical triangle.at n=14A258143
• a(n) = 2^n+(1+(n mod 2)/2)*C(n+1,floor((n+(n mod 2))/2))-1.at n=14A261682
• Starts of a run of at least n consecutive numbers k for which k^2 - k + 41 is composite.at n=19A284043
• Starts of a run of at least n consecutive numbers k for which k^2 - k + 41 is composite.at n=20A284043
• The number of paths of length 2m in the plane, starting and ending at (0,1), with unit steps in the four directions (north, east, south, west) and staying in the region y > 0 or x > -y.at n=5A292361