Expansion of g.f. A(x) satisfying A(x) = (1 + 2*x*A(x))^2 / (1 + 2*x*A(x) - 2*x^3*A(x)^3).
A365516
Expansion of g.f. A(x) satisfying A(x) = (1 + 2*x*A(x))^2 / (1 + 2*x*A(x) - 2*x^3*A(x)^3).
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =32a(5) =112a(6) =400a(7) =1464a(8) =5520a(9) =21296a(10) =83456a(11) =331136a(12) =1328320a(13) =5379200a(14) =21959936a(15) =90271904a(16) =373347840a(17) =1552438016a(18) =6486311680a(19) =27217331456a(20) =114649525760a(21) =484640538112
External references
- oeis: A365516