52101

Appears in sequences

• A014486-indices of binary trees whose left and right subtree are identical.at n=32A083938
• Triangle read by rows: T(n,k) is the number of multigraphs without loops on n labeled nodes with k edges and maximum degree 2.at n=49A095693
• T(n,4) diagonal of triangle in A095693.at n=5A095695
• a(n) = n*(6*n^2 - 8*n + 3).at n=21A272378