123291

Appears in sequences

• [ n(n-1)(n-2)(n-3)/7 ].at n=32A011917
• Expansion of (1+4*x+x^2)/((1+x)^2*(1-x)^5).at n=35A233329
• Number of tilings of a 27 X n rectangle using 3n nonominoes of shape I.at n=20A251078
• Number of n X n 0..1 arrays with every element equal to 0, 1, 2 or 4 king-move adjacent elements, with upper left element zero.at n=18A297882