158616

Appears in sequences

• Number of 1:3:sqrt(10) proportioned triangles on a (n+1) X (n+1) grid.at n=29A190102
• a(n) is equal to the last point of a reverse pyramid summation with base 1, 2, 3, ..., n-2, n-1, n, n-1, n-2, ..., 3, 2, 1.at n=9A359087
• Triangle read by rows where row n is the largest (or middle or n-th) column of the reverse pyramid summation of order n described in A359087.at n=54A360145