121301

Appears in sequences

• Strong pseudoprimes to base 12.at n=35A020238
• Strong pseudoprimes to base 89.at n=37A020315
• Expansion of 1 / ((1-x-x^2-x^3)*(1-x^2-x^3)).at n=19A103322
• Expansion of 1/(1 - x - x^2 + x^18 - x^20).at n=25A185357
• Auxiliary c(n) sequence used to prove some properties about Rowland's sequence. c(n) has the following recursive definition: c(1) = 5, c_(n+1) = c(n) + lfp(c(n)) - 1, where lpf(.) denotes the lowest prime factor of a number.at n=43A190894