When convolved with itself and doubled, gives the sequence A000609.
A116986
When convolved with itself and doubled, gives the sequence A000609.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =23a(4) =443a(5) =23131a(6) =3732309a(7) =2090705825
External references
- oeis: A116986