20796

Appears in sequences

• Narayana-Zidek-Capell numbers: a(n) = 1 for n <= 2. Otherwise a(2n) = 2a(2n-1), a(2n+1) = 2a(2n) - a(n).at n=17A002083
• Number of solutions to c(0)F(0) + ... + c(n)F(n) = 0, where c(i) = +-1 for i >= 0, number of (+1)'s >= number of (-1)'s, F(i) = A000045(i) = Fibonacci numbers.at n=41A058301
• Least positive k such that k*n + 1 is a golden semiprime (A108540).at n=12A108200
• Expansion of psi(-q^3) / psi(-q)^3 in powers of q where psi() is a Ramanujan theta function.at n=19A132974
• a(n) = floor((n + 1/2)^3).at n=27A219085
• a(n) is the number of permutations avoiding 231 and 312 realizable on increasing strict binary trees with 2n-1 nodes.at n=8A245904
• Number of (n+2) X (4+2) 0..1 arrays with no 3 x 3 subblock diagonal sum 1 and no antidiagonal sum 2 and no row sum 0 and no column sum 3.at n=42A255797
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 485", based on the 5-celled von Neumann neighborhood.at n=30A272504
• Number of parts in all partitions of n in which no part occurs more than eight times.at n=26A320611
• Number of double-free integer partitions of n.at n=46A323092