42396

Appears in sequences

• Exponential Riordan array (e^(x), x*A000108(x)).at n=22A185946
• Number of ordered full binary trees with labels from a set of at most n labels.at n=5A224500
• G.f. satisfies: A(x) = (1 + x*A(x))^2 * (1 + 3*A(x)) / 4.at n=4A231553
• Number of length n 0..3 arrays with each partial sum starting from the beginning no more than one standard deviation from its mean.at n=8A244783
• Expansion of Product_{k>=1} (1/(1 + 3*x^k))^k.at n=10A261567
• Number of nX4 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=7A281396
• Triangular array read by rows. T(n,k) is the number of partial functions on [n] with index k, n=0 implies k=1, otherwise n >= 1, 1 <= k <= n.at n=17A341093
• Number of tilings of a 5 X n rectangle using n pentominoes of shapes U, Y, Z.at n=21A352421