a(n) = 4^n * [x^n] 1/sqrt(1-x) * Product_{k>=1} 1/(1 - x^k).
A325947
a(n) = 4^n * [x^n] 1/sqrt(1-x) * Product_{k>=1} 1/(1 - x^k).
Terms
- a(0) =1a(1) =6a(2) =46a(3) =300a(4) =2006a(5) =12052a(6) =75084a(7) =433112a(8) =2541158a(9) =14335236a(10) =80927780a(11) =444028008a(12) =2449471228a(13) =13181074888a(14) =70952319064a(15) =376464119216
External references
- oeis: A325947