a(0) = 1, for n > 0: a(n) = Sum_{k=0..n-1} a(k) * (1 + a(n-1-k)).
A215973
a(0) = 1, for n > 0: a(n) = Sum_{k=0..n-1} a(k) * (1 + a(n-1-k)).
Terms
- a(0) =1a(1) =2a(2) =7a(3) =28a(4) =122a(5) =565a(6) =2735a(7) =13682a(8) =70188a(9) =367248a(10) =1952394a(11) =10516141a(12) =57265929a(13) =314751625a(14) =1743829163a(15) =9728561418a(16) =54604800126a(17) =308137127382
External references
- oeis: A215973