30904
domain: N
Appears in sequences
- Number of quasi-tetrominoes in an n X n bounding box.at n=9A094171
- Number of 3-step knight's tours on an (n+2) X (n+2) board summed over all starting positions.at n=23A186852
- Number of (n+1)X3 0..3 arrays with no 2X2 subblock having the same number of equal edges as its horizontal or vertical neighbors, and new values 0..3 introduced in row major order.at n=2A205348
- Number of (n+1)X4 0..3 arrays with no 2X2 subblock having the same number of equal edges as its horizontal or vertical neighbors, and new values 0..3 introduced in row major order.at n=1A205349
- T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock having the same number of equal edges as its horizontal or vertical neighbors, and new values 0..3 introduced in row major order.at n=7A205352
- T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock having the same number of equal edges as its horizontal or vertical neighbors, and new values 0..3 introduced in row major order.at n=8A205352
- A generalized Engel expansion of 1/Pi.at n=11A232328
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 393", based on the 5-celled von Neumann neighborhood.at n=38A271604
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 878", based on the 5-celled von Neumann neighborhood.at n=43A273741
- a(n) is the number of normal generalized Young tableaux of size n with all rows and columns weakly increasing and all regions skew partitions.at n=7A299926
- Number of nX5 0..1 arrays with every element equal to 0, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.at n=7A301605
- T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.at n=70A301608
- Numbers k which are the product of a cube greater than 1 and a prime, and where k-1 and k-2 are semiprimes.at n=42A350284