a(n) = 2^(2*n - HammingWeight(n)) * [x^n] ((x-1)^(-1) + (1-x)^(-3/2)).
A173384
a(n) = 2^(2*n - HammingWeight(n)) * [x^n] ((x-1)^(-1) + (1-x)^(-3/2)).
Terms
- a(0) =0a(1) =1a(2) =7a(3) =19a(4) =187a(5) =437a(6) =1979a(7) =4387a(8) =76627a(9) =165409a(10) =707825a(11) =1503829a(12) =12706671a(13) =26713417a(14) =111868243a(15) =233431331a(16) =7770342787a(17) =16124087129a(18) =66765132341a(19) =137948422657
External references
- oeis: A173384