a(n) = 4^n * [x^n] sqrt(1-x) * Product_{k>=1} 1/(1 - x^k).
A325948
a(n) = 4^n * [x^n] sqrt(1-x) * Product_{k>=1} 1/(1 - x^k).
Terms
- a(0) =1a(1) =2a(2) =22a(3) =116a(4) =806a(5) =4028a(6) =26876a(7) =132776a(8) =808710a(9) =4170604a(10) =23586836a(11) =120316888a(12) =673359196a(13) =3383189976a(14) =18228019512a(15) =92654842960a(16) =486382544838
External references
- oeis: A325948