2661504

Appears in sequences

• Row sums of array A090452 (s2_{3,2}, scaled (3,2)-Stirling2).at n=7A090442
• Triangle read by rows: T(n,k) = Sum_{i <= n, j <= k, (i,j) <> (n,k)} T(i,j), starting with T(1,1) = 1, for n >= 1 and 1 <= k <= n.at n=43A192933
• Number of equilateral triangles with coordinates (w,x,y,z) in the set {0, 1,...,n}.at n=5A226558