1501500

Appears in sequences

• Theta series of A_21 lattice.at n=3A023912
• Average of twin prime pairs n having their decimal expansion of the form abcabc or abcabc0 such that n contains three twin primes as divisors.at n=11A235716
• Number T(n,k) of 2n-length strings of balanced parentheses of exactly k different types that are introduced in ascending order; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=41A253180
• Number of 2n-length strings of balanced parentheses of exactly 5 different types that are introduced in ascending order.at n=3A258393
• Triangle read by rows, Lah numbers of order 2, T(n,n) = 1, T(n,k) = 0 if k<0 or k>n, otherwise T(n,k) = T(n-1,k-1)+((n-1)^2+k^2)*T(n-1,k), for n>=0 and 0<=k<=n.at n=31A268434
• Numbers k such that A383543(k) > A383543(m) for all m < k.at n=16A383544