115668

Appears in sequences

• a(n) = (n-1)*(n-2)*(n-3)*(3*n-10)*3^(n-5)/4.at n=8A086864
• Triangle read by rows: T(n,k) is the number of ternary trees with n edges and having k leaves (i.e., vertices of degree 0; n>=0, k>=1). A ternary tree is a rooted tree in which each vertex has at most three children and each child of a vertex is designated as its left or middle or right child.at n=26A120429
• a(n) = 100*n^2 + 2*n.at n=33A158127
• Number of nonoverlapping placements of one 1 X 1 square and one 2 X 2 square on an n X n board.at n=18A173963
• Number of length 3+4 0..n arrays with every five consecutive terms having two times the sum of some three elements equal to three times the sum of the remaining two.at n=10A248990
• Least n-gonal number greater than 1 such that sigma(n) is also n-gonal.at n=19A259240
• Numbers k such that (4*10^k - 79)/3 is prime.at n=21A289752
• Discriminants of totally real cubic fields with 2 associated nonconjugate fields.at n=21A329786