1630174

Appears in sequences

• Alternating row sums of triangle A134285, called s2(3)'.at n=12A134827
• Number of nX5 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 0 1 vertically.at n=27A207021
• Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any element within a city block distance of two, and containing the value n(n+1)/2-3.at n=10A212040