22215

Appears in sequences

• Number of uud-avoiding rooted non-crossing trees of n+1 vertices with the root 1.at n=8A187764
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 267", based on the 5-celled von Neumann neighborhood.at n=31A271085
• Solution of the complementary equation a(n) = a(n-1) + a(n-3) + a(n-4) + b(n-4), where a(0) = 1, a(1) = 2, a(2) = 3, a(3) = 4, b(0) = 5, b(1) = 6, b(2) = 7, b(3) = 8, and (a(n)) and (b(n)) are increasing complementary sequences.at n=19A295754
• Number of vertices in a regular drawing of the complete bipartite graph K_{n,n}.at n=20A331755
• a(n) is the multiplicative inverse of A008514(n+1) modulo A008514(n).at n=10A334137
• G.f. A(x) satisfies A(x) = 1 + x^4 * (A(x) / (1 - x))^3.at n=17A364403