a(n) = Sum_{k=0..n} 2^(n-k) * binomial(n-1,n-k) * binomial(2*k,k).
A360317
a(n) = Sum_{k=0..n} 2^(n-k) * binomial(n-1,n-k) * binomial(2*k,k).
Terms
- a(0) =1a(1) =2a(2) =10a(3) =52a(4) =278a(5) =1516a(6) =8388a(7) =46920a(8) =264678a(9) =1503052a(10) =8581676a(11) =49215256a(12) =283297660a(13) =1635904376a(14) =9472214344a(15) =54975423504a(16) =319729353606
External references
- oeis: A360317