254900

Appears in sequences

• T(n,k)=Equals one maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..3 nXk array.at n=30A221062
• Equals one maps: number of 3Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..3 3Xn array.at n=5A221064
• Sum of two consecutive primes that is also sum of two consecutive even positive squares.at n=23A236461