E.g.f. satisfies A(x) = exp( Integral abs(1/A(x)) dx ), where abs(F(x)) equals the series expansion formed by the unsigned coefficients in F(x).
A381360
E.g.f. satisfies A(x) = exp( Integral abs(1/A(x)) dx ), 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) =12a(5) =40a(6) =160a(7) =720a(8) =3680a(9) =20800a(10) =129600a(11) =880000a(12) =6476800a(13) =51321600a(14) =435776000a(15) =3946624000a(16) =37977984000a(17) =386949376000
External references
- oeis: A381360