197890

Appears in sequences

• Number of permutations of 1..n with number of rises (p(i+1)>p(i)) different from number of rises in the inverse permutation.at n=9A180388
• Least integer b > F(n) such that sum_{k=1}^n F(k)*b^{k-1} is prime, where F = A000045.at n=25A224487
• Smallest composite number with exactly n distinct prime factors with the property that the concatenation of its prime factors (with multiplicity), in descending order, is a palindrome.at n=4A273776