a(n) = 7*(a(n-1) - a(n-2) - a(n-3)), with a(0)=3, a(1)=7, a(2)=35.
A215575
a(n) = 7*(a(n-1) - a(n-2) - a(n-3)), with a(0)=3, a(1)=7, a(2)=35.
Terms
- a(0) =3a(1) =7a(2) =35a(3) =175a(4) =931a(5) =5047a(6) =27587a(7) =151263a(8) =830403a(9) =4560871a(10) =25054435a(11) =137642127a(12) =756187747a(13) =4154438295a(14) =22824258947a(15) =125395430335a(16) =688917131651
External references
- oeis: A215575