19644

Appears in sequences

• McKay-Thompson series of class 20b for Monster.at n=23A058557
• Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0), ending on the vertical axis and consisting of n steps taken from {(-1, -1), (0, 1), (1, 0)}.at n=13A151376
• Number of n X n binary matrices with rows and columns each in strictly increasing order as binary numbers and every 0 adjacent to a 1 and every 1 adjacent to a 0.at n=8A181010
• Number of (n+1)X(2+1) 0..3 arrays with every 2X2 subblock summing to 5 6 or 7.at n=1A251375
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock summing to 5 6 or 7.at n=4A251381
• a(n) = Sum_{k=0..7} (n + k)^2.at n=46A276026
• Ulam numbers u such that 5*u is also an Ulam number.at n=32A287613
• Number of integer partitions of n whose LCM is greater than n.at n=38A327779
• Number of tilings of a right isosceles triangle by n right isosceles triangular tiles of any size, such that the intersection of any two tiles is either empty, a vertex of both tiles, or an edge of both tiles.at n=16A369237