Main diagonal and central terms of symmetric triangle A126155.
A126157
Main diagonal and central terms of symmetric triangle A126155.
Terms
- a(0) =1a(1) =5a(2) =55a(3) =1415a(4) =69025a(5) =5403005a(6) =616437655a(7) =96365988815
External references
- oeis: A126157