126484

Appears in sequences

• G.f.: Sum_{n>=1} x^n * (1-x^n)^(n-1) / (1-x)^(n-1).at n=18A221834
• Number of n X n 0..1 arrays with every element unequal to 0, 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.at n=4A305587
• Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.at n=4A305590
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.at n=40A305593