219201

Appears in sequences

• Add 1, multiply by 1, add 2, multiply by 2, etc.; start with 0.at n=17A019461
• a(0) = 1; a(n) = (n-1)*a(n-1) + n.at n=9A111063
• Integers n such that each of n, n + 1, n + 2, n + 4, n + 5, n + 6 is the squarefree product of three primes.at n=10A242805
• Array read by downward antidiagonals: A(n,k) = A(n-1,k+1) + 2*(k+1)!*Sum_{j=0..k} A(n-1,j)/j! with A(0,k) = 1, n >= 0, k >= 0.at n=37A379458