90010

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 60.at n=9A031738
• Numbers k such that 1000k+1, 1000k+3, 1000k+7, 1000k+9 are all primes.at n=32A064962
• Numbers k such that k and k^2 use only the digits 0, 1, 4, 8 and 9.at n=42A136867
• Numbers k such that k and k^2 use only the digits 0, 1, 5, 8 and 9.at n=28A136874
• Numbers k such that k and k^2 use only the digits 0, 1, 6, 8 and 9.at n=30A136879
• Numbers k such that k and k^2 use only the digits 0, 1, 7, 8 and 9.at n=30A136880
• Numbers k such that k and k^2 use only the digits 0, 1, 8 and 9.at n=28A136881
• a(n) = 100*n^2 + 10.at n=30A158492
• Composite numbers n with k digits such that each sum of 1 to k digits of n is substring of n.at n=45A205530
• Numbers n such that A = n - digitsum(n) is divisible by the largest power of 10 <= A.at n=39A242474
• Consider a number k with m decimal digits, the prefix p of length m-1 and the suffix s of length m-1. The sequence lists the numbers k such that sigma(k) = sigma(p)*sigma(s) where sigma(x) is the sum of the divisors of x.at n=32A244313
• Diagonal of the triangle A354700.at n=27A354701