31969

Appears in sequences

• Number of (n+2) X 5 binary arrays with each 3 X 3 subblock having rows and columns in lexicographically nondecreasing order.at n=14A184542
• Augmentation of the Catalan triangle, A009766. See Comments.at n=40A193560
• Number of nX3 0..1 arrays with every element unequal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=8A318040
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=57A318045
• Numbers k such that Sum_{j=1..k} (-j)^j == 1 (mod k).at n=9A343930