28471

Appears in sequences

• Strong pseudoprimes to base 72.at n=17A020298
• Composite numbers n such that k! == 1 (mod n) for some k > 2.at n=27A049048
• Row sums of triangle A035342 and array A134144.at n=5A049118
• Number of binary strings of length n with equal numbers of 00011 and 01001 substrings.at n=16A164230
• a(n) = number of regions in the configuration A290447(n).at n=30A290865
• Number of integers less than the (n+1)-th primorial such that the maximal exponent in their prime factorization is not less than the maximal digit in their primorial base expansion.at n=6A351070