126281

Appears in sequences

• T(n,n-3), array T as in A047100.at n=9A047105
• Eight bishops and one elephant on a 3 X 3 chessboard. a(n) = 2^(n+2) - 3*F(n+2).at n=15A175660
• Number of 2 X 2 matrices with all terms in {0,1,...,n} and even determinant.at n=20A210369
• Number of 2 X 2 matrices having all terms in {-n,...,0,..,n} and even determinant.at n=10A211154
• Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 1 3 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 1 3 6 or 7.at n=9A252151
• a(n) = a(n-2) + 2*a(n-3) for n >= 3, where a(0) = 2, a(2) = 4, a(3) = 5.at n=26A288668
• Expansion of Product_{k>=1} (Product_{j=1..k} (1 + x^(k*j))^j).at n=42A327063