239994

Appears in sequences

• T(n,k)=Number of nXk arrays containing k copies of 0..n-1 avoiding the pattern down-up in every row and column.at n=30A269505
• Number of 3Xn arrays containing n copies of 0..3-1 avoiding the pattern down-up in every row and column.at n=5A269507
• Expansion of e.g.f. 1/(1 + LambertW(-log(1 + x))).at n=7A305819