242371

Properties

Appears in sequences

• Triangle read by rows: T(n,k) (n>=1, 1 <= k <= n) = number of n-element unlabeled interval posets of height k.at n=68A193387
• Number of 4 X n 0..1 arrays with rows and antidiagonals unimodal and columns nondecreasing.at n=14A224148
• Coefficients in the power series A(x) such that: A(x)^3 = Sum_{n=-oo..+oo} x^(2*n+1) * (1 - x^n)^(n+1) * A(x)^n.at n=7A357153
• Prime numbersat n=21417