a(1)=1, then add 1 multiply by 2 to get a(2), subtract 1 and multiply by 3 to get a(3), add 1 and multiply by 4 to get a(4) and so on.
A085110
a(1)=1, then add 1 multiply by 2 to get a(2), subtract 1 and multiply by 3 to get a(3), add 1 and multiply by 4 to get a(4) and so on.
Terms
- a(0) =1a(1) =4a(2) =9a(3) =40a(4) =195a(5) =1176a(6) =8225a(7) =65808a(8) =592263a(9) =5922640a(10) =65149029a(11) =781788360a(12) =10163248667a(13) =142285481352
External references
- oeis: A085110