34608

Appears in sequences

• Number of binary forests with n nodes.at n=16A003214
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 31.at n=5A031709
• a(n) = 961*n^2 + 2*n.at n=5A158413
• Number of nXnXn triangular nonnegative integer arrays with all sums of an element and its neighbors <= 13.at n=3A166185
• Number of 3 X 3 X 3 triangular nonnegative integer arrays with all sums of an element and its neighbors <= n.at n=13A166189
• Number of right isosceles triangles that can be formed from the n^2 points of n X n grid of points (or geoboard).at n=16A187452
• Number of nX7 0..1 arrays avoiding 0 0 1 and 1 0 1 horizontally and 0 1 0 and 1 0 1 vertically.at n=4A207253
• Number of 5 X n 0..1 arrays avoiding 0 0 1 and 1 0 1 horizontally and 0 1 0 and 1 0 1 vertically.at n=6A207256
• Unsigned matrix inverse of triangle A214398, as a triangle read by rows n >= 1.at n=41A215241
• Number of (n+1) X (n+1) 0..5 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=2A234983
• Number of (n+1) X (3+1) 0..5 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=2A234986
• T(n,k) is the number of (n+1) X (k+1) 0..5 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=12A234991
• Triangle T(n,m) = Sum_{k=0..m} (-1)^(m-k)*binomial(m,k)*binomial(n-m+k-1,m-1)*binomial(2*n-3*m+k-1,n-m), T(n,n)=1.at n=58A271776
• a(n) is the total displacement of all letters in all permutations of n letters with no fixed points.at n=7A305730
• Triangle read by rows: T(n,k) is the number of partitions of a 3-colored set of n objects into at most k parts with 0 <= k <= n.at n=62A382045
• a(n) = Sum_{k=0..n} 2^k * 3^(n-k) * binomial(k+6,6) * binomial(2*k,2*(n-k)).at n=4A391779