234111

Appears in sequences

• Expansion of 1/(1-4*x+x^3).at n=9A099503
• a(n) is the number of odd numbers k in range [2^n, (2^(n+1))-1] such that all terms in finite sequence [k, floor(k/2), floor(k/4), floor(k/8), ..., 1] are squarefree.at n=42A293441