G.f. satisfies A(x) = Sum_{n>=0} x^n * abs(1/A(x)^n), where abs(F(x)) equals the series expansion formed by the unsigned coefficients in F(x).
A383377
G.f. satisfies A(x) = Sum_{n>=0} x^n * abs(1/A(x)^n), where abs(F(x)) equals the series expansion formed by the unsigned coefficients in F(x).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =6a(5) =6a(6) =20a(7) =46a(8) =92a(9) =138a(10) =276a(11) =676a(12) =1476a(13) =3332a(14) =5670a(15) =11574a(16) =27262a(17) =61952a(18) =135354a(19) =222848a(20) =549226a(21) =1319282a(22) =3068894a(23) =6449978a(24) =10987080a(25) =27779594a(26) =67311236a(27) =157054012a(28) =313271538a(29) =579149708
External references
- oeis: A383377