a(n) = Sum_{k=0..n} hypergeometric([-k, k + 1], [-k - 1], n - k).
A323207
a(n) = Sum_{k=0..n} hypergeometric([-k, k + 1], [-k - 1], n - k).
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =33a(5) =141a(6) =752a(7) =4825a(8) =36027a(9) =305132a(10) =2879840a(11) =29909421a(12) =338479429a(13) =4139716658a(14) =54339861530a(15) =761150445734
External references
- oeis: A323207