1263361

Appears in sequences

• a(n) = -2*a(n - 1) -a(n - 2) -a(n - 3), a(0) = a(1) = a(2) = 1.at n=26A056016
• a(n+1) = a(n)*100 + 21^n, with a(1)=1.at n=3A178510