30940

Appears in sequences

• a(n) = n^4 + n^3 + n^2 + n.at n=13A027445
• Even numbers to the right of the central numbers of the (1,2)-Pascal triangle A029635.at n=46A029643
• Even numbers to the left of the central elements of the (2,1)-Pascal triangle A029653.at n=48A029665
• Sums of distinct powers of 13.at n=30A033049
• a(n) = binomial(n+5,5)*(n+3)/3.at n=12A040977
• Numbers k such that the sum of the squares of the divisors of k is divisible by k.at n=33A046762
• Row sums of A075652.at n=27A075650
• Seventh column (m=6) of (1,3)-Pascal triangle A095660.at n=12A095662
• In the interior of a regular 2n-gon with all diagonals drawn, the number of points where exactly three diagonals intersect.at n=33A101363
• Heights of right triangles that are solutions to Leech's problem A117319.at n=29A117321
• a(n) = Sum_{k=1..A124259(n)} n^k.at n=12A124260
• a(n) = n*binomial(n+4, 4).at n=13A174002
• Rectangular array T(n,k) = binomial(n+1,2)*(n^k - (n-1)^k) read by antidiagonals.at n=51A178831
• Composition of Catalan and Fibonacci numbers.at n=73A189675
• Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,2,1,0 for x=0,1,2,3,4.at n=6A197213
• Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,2,1,0 for x=0,1,2,3,4.at n=3A197216
• T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,3,2,1,0 for x=0,1,2,3,4.at n=48A197217
• T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,3,2,1,0 for x=0,1,2,3,4.at n=51A197217
• Numbers k such that A037610(k) is prime.at n=6A261672
• Number of paths from (0,0) to (n,n) that use E(1,0) and N(0,1) as steps and have even number of East steps below the line y=x-1.at n=9A268213