102476

Appears in sequences

• Number of ways to place a non-attacking white and black knight on n X n chessboard.at n=17A035289
• a(n) = binomial(n+5,5) + 4*binomial(n+4,5) + 4*binomial(n+3,5) + binomial(n+2,5).at n=15A244864
• a(n) is the sum of the base-b representations of n for 2 <= b <= n+1 read in base ten.at n=38A289335
• Symmetric difference of the primitive non-deficient numbers and the primitive Zumkeller numbers.at n=36A378538
• Numbers that are primitive Zumkeller, but not primitive non-deficient.at n=26A378657