20000000000
domain: N
Appears in sequences
- Powers of 2 written in base 4.at n=21A004643
- Powers of 2 written in base 8.at n=31A004647
- a(n) = 2*n^n, n >= 2, otherwise a(n) = 1.at n=10A013499
- Numbers k such that k^2 + k + 4 is a palindrome.at n=26A027716
- Numbers k such that k^3 has at most two different digits.at n=26A030292
- a(n) = ceiling(sqrt(4*10^n)).at n=20A035071
- a(n) is the index of the smallest triangular number containing exactly n 0's.at n=18A048355
- Expansion of g.f. (1+2*x+5*x^2)/(1-10*x^3).at n=31A051109
- a(n) = denominator(N), where N = 0.135..(2n-1) is the concatenation of the first n odd numbers after decimal point.at n=7A078259
- 10th binomial transform of (1,1,0,0,0,0,...).at n=10A081122
- Expansion of (1 - 8*x)/(1 - 10*x).at n=11A093136
- Erroneous version of A052216.at n=20A094629
- a(1) = 1; for n>1, a(n) = smallest number > a(n-1) such that last digit of a(n-1) + first digit of a(n) = 3.at n=29A098408
- Base 3 representation of the positive integers n such that Sum[d[k],k=1..n] is an integer, where d(k) is the base 3 fraction 0.k (e.g., d(22 base 10)=d(211 base 3)=0.221 base 3).at n=13A107483
- Numbers with no "e" in Dutch.at n=10A114644
- Numbers with no "e" in Dutch (Miljard without "een").at n=11A115072
- Complete list of all 5 numbers n such that n is equal to the number of 5's in the decimal digits of all numbers <= n.at n=2A130427
- List of all numbers n such that n is equal to the number of 7's in the decimal digits of all numbers <= n.at n=14A130429
- Complete list of all 9 numbers n such that n is equal to the number of 9's in the decimal digits of all numbers <= n.at n=2A130431
- Numbers n such that the sum of all numbers formed by deleting one digit from n is equal to n.at n=33A131639