200000000000
domain: N
Appears in sequences
- Powers of 2 written in base 4.at n=23A004643
- a(n) = ceiling(sqrt(4*10^n)).at n=22A035071
- a(n) is the index of the smallest triangular number containing exactly n 0's.at n=20A048355
- Numbers k such that Sum_{j=1..k} d(j) is an integer where d(j) is the decimal fraction 0.2j (e.g., d(14) = 0.28).at n=19A054465
- Expansion of (1 - 8*x)/(1 - 10*x).at n=12A093136
- Erroneous version of A052216.at n=22A094629
- Numbers k such that k and k^2 use only the digits 0, 2, 3, 4 and 7.at n=26A136884
- Numbers k such that k and k^2 use only the digits 0, 2, 4 and 6.at n=28A136902