25546

Appears in sequences

• Pseudoprimes to base 15.at n=32A020143
• Number of -n..n arrays x(0..4) of 5 elements with sum zero and with zeroth through 4th differences all nonzero.at n=7A200041
• Number of 2 X 2 matrices having all terms in {1,...,n} and determinant = 0 (mod 3).at n=15A210698
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 206", based on the 5-celled von Neumann neighborhood.at n=43A270735
• Numbers k such that (17*10^k - 377)/9 is prime.at n=16A295322
• Solutions to A000010(x) + A000010(x-1) = A000010(2*x).at n=14A299535
• Centered triangular numbers which are products of three distinct primes.at n=16A359624
• a(n) = ((p-1)^n + (p+1)^n) mod p^2, where p is the n-th prime.at n=52A379544