103410

Appears in sequences

• Numbers k such that sigma(k) = 2*sigma(k+1).at n=26A163193
• Numbers k such that the average of the divisors of k and k+1 is the same.at n=19A238380
• Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and column sum 1 3 6 or 8 and every diagonal and antidiagonal sum not 1 3 6 or 8.at n=9A252010
• a(n) = 108*n^2 - 228*n + 114 (n>=2).at n=30A304618
• Numbers m such that tau(m) = 2 * tau(m + 1) and simultaneously sigma(m) = 2 * sigma(m + 1), where tau(k) = A000005(k) and sigma(k) = A000203(k).at n=3A353034