1689212

Appears in sequences

• a(n) = A(n)*7^(-floor(n+1)/3), where A(n) = 7*A(n-1) - 14*A(n-2) + 7*A(n-3) with A(0)=0, A(1)=1, A(2)=7.at n=21A217444
• Expansion of (1+x)/ ((1+x)^3-7*x).at n=13A290186