27416

Appears in sequences

• Column 4 of triangle A055907.at n=9A055910
• a(n) = n*(n^2 - 1)/2 - 1.at n=36A117560
• A triangular sequence recursion: A(n,k)=A(n - 1, k - 1) + A(n - 1, k) + (5 (-2 + n) (-7 + 5 n))*A(n - 2, k - 1).at n=12A153879
• Number of nondecreasing arrangements of n numbers in -3..3 with sum zero and sum of squares less than n*12/3.at n=31A183929