9-fold convolution of A000302 (powers of 4).
A054339
9-fold convolution of A000302 (powers of 4).
Terms
- a(0) =1a(1) =36a(2) =720a(3) =10560a(4) =126720a(5) =1317888a(6) =12300288a(7) =105431040a(8) =843448320a(9) =6372720640a(10) =45883588608a(11) =317013884928
External references
- oeis: A054339