1027446

Appears in sequences

• Triangle read by rows: T(n,k) is the number of non-derangement permutations of {1,2,...,n} having genus k (see first comment for definition of genus).at n=47A178517
• Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and column sum not 1 3 6 or 8 and every diagonal and antidiagonal sum 1 3 6 or 8.at n=13A252047