74183

Appears in sequences

• Triangle read by rows: a(n,k) is the number of permutations of n elements with prefix transposition distance equal to k.at n=42A164645
• Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 1 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 1 3 6 or 7.at n=10A252301
• Number of positive solutions to (x_1)^2 + (x_2)^2 + (x_3)^2 + (x_4)^2 <= n^2.at n=21A341423