80826

Appears in sequences

• McKay-Thompson series of class 18E for Monster.at n=26A058535
• McKay-Thompson series of class 18E for the Monster group with a(0) = 3.at n=26A128517
• Number of nX4 0..1 arrays with every element unequal to 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=9A318210