Coefficient of x in the reduction by x^2 -> x+1 of the polynomial p(n,x)=(2x+1)(2x+2)...(2x+n).
A192942
Coefficient of x in the reduction by x^2 -> x+1 of the polynomial p(n,x)=(2x+1)(2x+2)...(2x+n).
Terms
- a(0) =0a(1) =2a(2) =10a(3) =62a(4) =448a(5) =3688a(6) =34056a(7) =348568a(8) =3916352a(9) =47919520a(10) =634256480a(11) =9029234720a(12) =137569217280
External references
- oeis: A192942