26268
domain: N
Appears in sequences
- Least k such that first k terms of A022300 contain n more 2's than 1's.at n=29A025515
- a(n) = 54*n^2 + 6*n.at n=22A277990
- a(n) = 2*a(n-1) - a(n-3) + a(floor(n/2)), where a(0) = 1, a(1) = 2, a(2) = 3.at n=17A298403
- Numbers k such that R(k) + 10^floor(k/2-1) is prime, where R(k) = (10^k-1)/9 (repunit: A002275).at n=14A331860