61938

Appears in sequences

• Number of primes between n*10^6 and (n+1)*10^6.at n=10A038826
• Numbers k such that the k-th triangular number contains only digits {1,8,9}.at n=11A119151
• a(n) = n*(4*n^2+5*n-3)/2.at n=30A126335
• Number of primes between 10^n and 10^n+10^(n-1).at n=6A131043
• a(n) is the smallest even k >= 2 such that the first n multiples of k have the same sum of digits, but (n + 1)*k has a different one. a(n) = 0 if no such k exists.at n=34A237994
• a(n) is the smallest k > 0 such that the first n multiples of k have the same sum of digits, but (n+1)k has a different one. a(n)=0 if no such k exists.at n=34A238088
• Triangle read by rows: T(n,k) is the number of primes in the half-open interval [10^n, 10^n + 10^k), n >= 1, 1 <= k <= n.at n=26A323744