27387
domain: N
Appears in sequences
- Schroeder pseudoprimes: Composites k that divide the k-th Schroeder number A001003(k-1).at n=27A075764
- Numbers k such that lcm(1,2,3,...,k)/13 equals the denominator of the k-th harmonic number H(k).at n=13A112818
- Number of 0..n arrays x(0..11) of 12 elements with zero 6th differences.at n=43A200374
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 542", based on the 5-celled von Neumann neighborhood.at n=42A272811
- Number of partitions such that the least positive integer which is not a part of the partition is prime.at n=41A305937
- a(n) = n*(2*n - 3 - (-1)^n)*(5*n - 2 + (-1)^n)/16.at n=35A308025
- Numbers k such that A071324(k) = A071324(k+1).at n=16A333261