a(n) = 2^(2*n - HammingWeight(n)) * [x^n] ((x - 1)^(-2) - (1 - x)^(-3/2)).
A380952
a(n) = 2^(2*n - HammingWeight(n)) * [x^n] ((x - 1)^(-2) - (1 - x)^(-3/2)).
Terms
- a(0) =0a(1) =1a(2) =9a(3) =29a(4) =325a(5) =843a(6) =4165a(7) =9949a(8) =185517a(9) =424415a(10) =1913615a(11) =4263339a(12) =37624977a(13) =82338487a(14) =357893805a(15) =773201629a(16) =26589395581a(17) =56890356903a(18) =242472512971a(19) =514886606335
External references
- oeis: A380952