63905

Appears in sequences

• Number of singular 2 X 2 matrices having all elements in {-n,...,n}.at n=36A209981
• Number of nX7 0..1 arrays with every element unequal to 0, 1 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=22A317772
• Number of integer compositions of n whose leaders of strictly decreasing runs are weakly increasing.at n=22A374764