69584

Appears in sequences

• Triangle of numbers {a(n,k), n >= 0, 0 <= k <= n} defined by a(0,0)=1, a(n,0)=A000670(n), a(n,n)=A000629(n), a(n,k) = a(n,k-1) + a(n-1,k-1); a(n+1,0) = Sum_{k=0..n} a(n,k).at n=32A073146
• Number of positive integers <= 10^n that are divisible by no prime exceeding 5.at n=34A106598
• Number of nX3 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor.at n=9A199128
• Number of length n+7 0..1 arrays with at most one downstep in every 7 consecutive neighbor pairs.at n=15A255991