182520

Appears in sequences

• Number of (n+2) X 3 binary matrices with every 3 X 3 block having exactly four 1's.at n=7A181255
• T(n,k) = number of (n+2) X (k+2) binary matrices with every 3 X 3 block having exactly four 1's.at n=28A181262
• T(n,k) = number of (n+2) X (k+2) binary matrices with every 3 X 3 block having exactly four 1's.at n=35A181262
• Numbers with prime factorization pq^2r^3s^3.at n=23A190320
• Molecular topological indices of the web graphs.at n=29A192850
• Least positive integer k such that prime(k)-k, prime(k)+k, prime(k*n)-k*n, prime(k*n)+k*n, prime(k)+k*n and prime(k*n)+k are all prime.at n=22A259492
• Integers k such that sigma(k)/k - 1 is a rational square.at n=11A383482