90171

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, diagonal and antidiagonal neighbors in a random 0..1 nXk array.at n=38A220537
• Equals one maps: number of 3Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 3Xn array.at n=6A220539
• Sum over all partitions of n of the number of distinct parts i of multiplicity i - 1.at n=50A277101