2018940

Appears in sequences

• a(n) = binomial(n+3,3)*binomial(n+6,3).at n=17A105939
• Numbers with prime factorization pqrstuv^2.at n=10A190381
• Number of ways to place 3 points on a triangular grid of side n so that they are not vertices of an equilateral triangle of any orientation.at n=20A240440
• a(n) = Pochhammer(n, 5) / 2.at n=19A293615
• Numbers that occur exactly 4 times in A036038, i.e., numbers m such that the multinomial coefficient (x_1 + ... + x_k)!/(x_1! * ... * x_k!) is equal to m for exactly 4 integer partitions (x_1, ..., x_k).at n=30A376374