43580

Appears in sequences

• Position of 2^n among the powers of primes (A000961).at n=19A024622
• Number of partitions satisfying (cn(2,5) <= cn(1,5) and cn(3,5) <= cn(1,5) and cn(2,5) <= cn(4,5) and cn(3,5) <= cn(4,5)).at n=50A036802
• Number of reversible string structures with n beads using a maximum of five different colors.at n=10A056324
• Crossing matchings: linear chord diagrams with 2n nodes and n arcs in which each arc crosses another arc.at n=7A081054
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 1), (0, 0, 1), (0, 1, 0), (1, 1, -1)}.at n=9A149955
• Positions of prime powers p^e with p < e within A000961.at n=27A192187
• Number of (n+1) X (3+1) 0..3 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant-stress 1 X 1 tilings).at n=12A235284
• Number T(n,k) of rooted trees with n nodes and colored non-root nodes using exactly k colors; triangle T(n,k), n>=1, 0<=k<=n-1, read by rows.at n=26A256064
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 397", based on the 5-celled von Neumann neighborhood.at n=39A271691
• Position of first appearance of n in A057820, the sequence of first differences of prime-powers, or 0 if n does not appear.at n=20A376341