42610

Appears in sequences

• T(n,k) = Sum_{i=0..k} (-1)^(k-i)*binomial(k,i)*A000670(n-k+i).at n=29A122101
• Triangle of F(n,r) of r-geometric numbers, 1 <= r <= n.at n=22A219374
• 2-Fubini numbers.at n=5A232472
• Number of compositions of n into distinct parts where each part i is marked with a word of length i over a quinary alphabet whose letters appear in alphabetical order.at n=7A261843
• Number of ordered set partitions of [n] such that for each block b the smallest integer interval containing b has at most six elements.at n=7A276896
• a(n) = Sum_{k=0..n} binomial(k+4,4) * binomial(2*k,2*n-2*k).at n=7A382471