22087

Appears in sequences

• a(n) = (n^3 - 2*n^2 + 3*n + 2)/2.at n=36A189890
• a(n) = A189912(n-1)-a(n-1) for n>0, a(0) = 1; extended Riordan numbers.at n=12A194588
• Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.at n=3A299655
• Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.at n=3A299657
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.at n=24A299661