30883

Appears in sequences

• (n - phi(n)) | sigma(n) for composite n not congruent to 2 (mod 4).at n=32A055164
• Number of nX4 0..3 arrays with no more than floor(nX4/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..3 order.at n=5A222475
• Number of nX6 0..3 arrays with no more than floor(nX6/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..3 order.at n=3A222477
• T(n,k)=Number of nXk 0..3 arrays with no more than floor(nXk/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..3 order.at n=39A222479
• T(n,k)=Number of nXk 0..3 arrays with no more than floor(nXk/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..3 order.at n=41A222479
• a(n) is the sum of quadratic nonresidues of A002145(n) (the n-th prime == 3 mod 4).at n=35A282036
• Let p = n-th prime == 3 mod 8; a(n) = sum of quadratic nonresidues mod p .at n=18A282726