21308

Appears in sequences

• a(n) = 9*n^3 - 18*n^2 + 10*n.at n=14A086605
• Number of arrays of 4 0..n integers with no sum of consecutive elements equal to a disjoint adjacent sum of an equal number of elements.at n=11A215191
• Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=10A306161
• a(1) = 1, a(2) = 2; for n >= 3, a(n) = (n-1)^3 - a(n-1) - a(n-2).at n=39A361134