155496

Appears in sequences

• n*A000084(n).at n=10A058353
• Triangle T(n,k) (n >= 2, 2 <= k <= n-1 if n > 2) giving number of non-crossing trees with n nodes and k endpoints.at n=42A072247
• Sigma(A033631(n)) {sigma is the sum of divisors function A000203}.at n=22A115619
• The Wiener index of the Kneser graph K(n,2) (n>=5).at n=28A228306
• Number of (n+1)X(6+1) 0..1 arrays with no element having a strict majority of its horizontal and antidiagonal neighbors equal to one.at n=2A231995
• T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with no element having a strict majority of its horizontal and antidiagonal neighbors equal to one.at n=30A231997
• Number of (3+1)X(n+1) 0..1 arrays with no element having a strict majority of its horizontal and antidiagonal neighbors equal to one.at n=5A232000
• Number of ways to place 2 points on a triangular grid of side n so that they are not adjacent.at n=31A239568
• Numbers k such that 7*10^k + 61 is prime.at n=24A281989