a(0)=1, a(1)=1; for n>1, a(n) = Sum_{i=0..n/2} binomial(n-i-1,i)*a(n-2i-1) + ((n+1) mod 2).
A079512
a(0)=1, a(1)=1; for n>1, a(n) = Sum_{i=0..n/2} binomial(n-i-1,i)*a(n-2i-1) + ((n+1) mod 2).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =6a(5) =13a(6) =29a(7) =72a(8) =185a(9) =499a(10) =1414a(11) =4132a(12) =12554a(13) =39332a(14) =126815a(15) =420769a(16) =1430790a(17) =4986139a(18) =17772536a(19) =64708212a(20) =240482750a(21) =911008926a(22) =3515571177a(23) =13807269626a(24) =55147622607a(25) =223864614364a(26) =922952281744
External references
- oeis: A079512