G.f. A(x) = (3*sqrt(1 - 8*x) - (1 - 4*x)) / (2*(1 - 8*x - 2*x^2)).
A384266
G.f. A(x) = (3*sqrt(1 - 8*x) - (1 - 4*x)) / (2*(1 - 8*x - 2*x^2)).
Terms
- a(0) =1a(1) =4a(2) =22a(3) =136a(4) =892a(5) =6064a(6) =42232a(7) =299296a(8) =2149360a(9) =15596992a(10) =114138592a(11) =841108096a(12) =6234779584a(13) =46448349952a(14) =347541337984
External references
- oeis: A384266