54036

Appears in sequences

• Number of 5-element ordered antichain covers of an unlabeled n-element set.at n=2A056093
• Low-temperature susceptibility expansion for hexagonal lattice (Potts model, q=3).at n=16A057383
• Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 7 (most significant digit on right).at n=11A061960
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 353", based on the 5-celled von Neumann neighborhood.at n=7A271306
• Rectangular array read by antidiagonals, T(n,k) is the number of labeled digraphs on [n] along with a (coloring) function c:[n] -> [k] such that for all u,v in [n], u->v implies u<=v and c(u)<=c(v), n>=0, k>=0.at n=39A382363