43720

Appears in sequences

• A Fielder sequence: a(n) = a(n-1) + a(n-2) + a(n-4).at n=18A001641
• Number of ways to cover (without overlapping) a ring lattice (necklace) of n sites with molecules that are 5 sites wide.at n=37A058368
• Antidiagonal sums of table A162430.at n=11A162434
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 185", based on the 5-celled von Neumann neighborhood.at n=38A270636
• G.f. A(x) satisfies: A(x) = 1 + x*A(x^2)/(1 - x)^2.at n=45A307889