195384

Appears in sequences

• Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 2 ones in any 3 X 3 X 3 subtriangle.at n=3A153912
• Number of rooted trees with n nodes and 7-colored non-root nodes.at n=6A246236
• Number of n X n 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once.at n=4A268802
• Number of nX5 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once.at n=4A268806
• T(n,k)=Number of nXk 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once.at n=40A268809
• a(n) = Sum_{d|n} n^tau(d).at n=20A345271