263523
domain: N
Appears in sequences
- Numbers n such that 9*10^n + 6*R_n - 5 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=26A103103
- Expansion of 3*x/(1 - 2*x^2 - 2*x + x^3).at n=13A120718
- a(n) = a(n-1) + a(n-3) + a(n-4), where a(0) = 0, a(1) = 1, a(2) = 0, a(3) = 2.at n=28A295681
- a(n) = a(n-1) + a(n-3) + a(n-4), where a(0) = 0, a(1) = 2, a(2) = 0, a(3) = 1.at n=28A295682