500000

Appears in sequences

• Numbers k such that the decimal expansion of k^2 contains k as a substring.at n=40A018834
• Numbers of form 5^i*10^j, with i, j >= 0.at n=30A025625
• a(n) = Sum_{k=0..n} (k+1) * T(n,k), with T given by A026386.at n=14A026955
• a(n)/100000 gives sqrt(n) to 5 places after the decimal point.at n=24A027663
• Substring of both its square and its cube.at n=37A029943
• a(n) = floor(10^7/n).at n=19A033425
• a(n) = floor(10^6/n).at n=1A033426
• Triangle whose (i,j)-th entry is binomial(i,j)*10^(i-j)*10^j.at n=16A038312
• Triangle whose (i,j)-th entry is binomial(i,j)*10^(i-j)*10^j.at n=19A038312
• Hexamorphic numbers: k such that the k-th hexagonal number ends with k.at n=27A039594
• Ambitious numbers: numbers n with the property that if a number ends in n then it is divisible by n.at n=26A039690
• Internal digits of n^2 include digits of n as substring.at n=24A046836
• Expansion of g.f. (1+2*x+5*x^2)/(1-10*x^3).at n=17A051109
• Numbers divisible by the 4th power of the sum of their digits in base 10.at n=28A072083
• Smallest multiple of n using only digits 0 and 5.at n=31A078244
• Full Łukasiewicz word for each rooted plane tree (interpretation e in Stanley's exercise 19) encoded by A014486 (or A063171).at n=23A079436
• Multiples of 2 in which there is no common digit in successive terms.at n=40A083490
• Multiples of 4 in which there is no common digit in successive terms.at n=38A083492
• Multiples of 8 in which there is no common digit in successive terms.at n=33A083496
• Expansion of (1-5*x)/(1-10*x).at n=6A093143