31750824

Appears in sequences

• 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=13A217274
• First term of n-th difference sequence of round((k*Pi)), k >= 0.at n=29A325846