Coefficient of x in the reduction by x^2->x+1 of the polynomial p(n,x) defined below in Comments.
A192380
Coefficient of x in the reduction by x^2->x+1 of the polynomial p(n,x) defined below in Comments.
Terms
- a(0) =0a(1) =2a(2) =4a(3) =20a(4) =60a(5) =230a(6) =776a(7) =2792a(8) =9720a(9) =34410a(10) =120780a(11) =425788a(12) =1497716a(13) =5274190a(14) =18562320a(15) =65348560a(16) =230024944a(17) =809742418a(18) =2850375060a(19) =10033806180a(20) =35320352940a(21) =124333050422a(22) =437670231064
External references
- oeis: A192380