18853

Appears in sequences

• Number of ways of placing 2n points on n X n grid so no 3 are in a line (solutions with no symmetry).at n=17A037185
• Closed 3-dimensional ball numbers (version 1): a(n)= number of integer points (i,j,k) contained in a closed ball of diameter n, centered at (0,0,0).at n=33A053591
• Open 3-dimensional ball numbers (version 1): a(n) is the number of integer points (i,j,k) contained in an open ball of diameter n, centered at (0,0,0).at n=33A053592
• Number of static n X n placements of water source-blocks in Minecraft.at n=5A329871
• Evaluation of the Big-Schröder polynomials at 1/2 and normalized with 2^n.at n=5A330802