1218816

Appears in sequences

• a(n) = (2*n*(n+1))^2.at n=23A060300
• Squares whose external digits form a square and whose internal digits form a prime.at n=17A076395
• Squares arising in A085039. n-th partial sum of A085039.at n=32A085040
• Squares which are divisible by the product of their digits.at n=11A118548
• Number of n X 2 binary arrays without the pattern 0 0 1 1 diagonally, vertically or horizontally.at n=10A189154
• Composite numbers whose number of proper divisors has a number of proper divisors which has a prime number of proper divisors.at n=30A223457
• a(1)=1; thereafter a(n) = smallest square m^2 such that m^2 minus (sum of all previous terms) is prime.at n=15A249567
• Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum less than the central column sum.at n=20A258886
• Number of non-attacking bishop positions on a cylindrical 3 X 2n chessboard.at n=6A287168