31006

Appears in sequences

• Open 3-dimensional ball numbers (version 2): a(n) is the number of integer points (i,j,k) contained in an open ball of diameter n, centered at (1/2,0,0).at n=39A053594
• Number of 0..4 arrays x(0..n-1) of n elements with nondecreasing average value.at n=9A200760
• Number of simple connected graphs with n nodes that are Eulerian and not integral.at n=9A243324
• Indices of centered pentagonal numbers (A005891) which are also squares (A000290).at n=6A254332