6039797760

Appears in sequences

• a(i) = the number of occurrences of 9's in the palindromic compositions of n=2*i-1 = the number of occurrences of 10's in the palindromic compositions of n=2*i.at n=27A079862
• Smallest number beginning with 6 and having exactly n prime divisors counted with multiplicity.at n=29A106426
• Least n-almost prime of the form semiprime + 1.at n=29A128665
• a(n) = composite(n)*2^(n - 3).at n=29A240135
• Number of digraphs with vertices {1..n} whose increasing edges are not crossing.at n=6A326251