Binomial coefficients C(2*n-4,5).

Terms

a(0) =6a(1) =56a(2) =252a(3) =792a(4) =2002a(5) =4368a(6) =8568a(7) =15504a(8) =26334a(9) =42504a(10) =65780a(11) =98280a(12) =142506a(13) =201376a(14) =278256a(15) =376992a(16) =501942a(17) =658008a(18) =850668a(19) =1086008a(20) =1370754a(21) =1712304a(22) =2118760a(23) =2598960a(24) =3162510a(25) =3819816a(26) =4582116a(27) =5461512a(28) =6471002a(29) =7624512