848492

Appears in sequences

• Pisot sequences E(5,7), P(5,7).at n=32A020711
• Pisot sequences E(7,10), P(7,10).at n=31A020721
• a(n) = floor(sqrt(a(n-1)^2 + a(n-2)^2 + a(n-1)*a(n-2))), a(1)=1, a(2)=3.at n=35A128424
• Number of n X 3 integer arrays with each element equal to the number of horizontal and vertical neighbors differing from itself by exactly one.at n=36A266076
• Number of nX2 0..1 arrays with every element unequal to 0, 1 or 2 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=17A317759