283089

Appears in sequences

• Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 5 ones in any 3 X 3 X 3 subtriangle.at n=13A153940
• Number of nX4 0..1 arrays with every element equal to 0, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=12A302208