a(n) = 2^(2*n - HammingWeight(n)) * [x^n] ((1 - x)^(-5/2) - (x - 1)^(-2)).
A380951
a(n) = 2^(2*n - HammingWeight(n)) * [x^n] ((1 - x)^(-5/2) - (x - 1)^(-2)).
Terms
- a(0) =0a(1) =1a(2) =11a(3) =41a(4) =515a(5) =1467a(6) =7847a(7) =20081a(8) =397923a(9) =961255a(10) =4552845a(11) =10609519a(12) =97582823a(13) =221879063a(14) =999384495a(15) =2232200321a(16) =79200753059a(17) =174525593247a(18) =764867505329
External references
- oeis: A380951