57017

Appears in sequences

• Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,1 3,2 4,2 5,2 6,3 polyhexes in any orientation on a planar nXnXn triangular grid.at n=8A155416
• -7-Knödel numbers.at n=31A225511
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 49", based on the 5-celled von Neumann neighborhood.at n=7A270015
• Number of irreducible involutions of length n.at n=12A278024