Binomial coefficients: C(n,k), 3 <= k <= n-3, sorted, duplicates removed.

Terms

a(0) =20a(1) =35a(2) =56a(3) =70a(4) =84a(5) =120a(6) =126a(7) =165a(8) =210a(9) =220a(10) =252a(11) =286a(12) =330a(13) =364a(14) =455a(15) =462a(16) =495a(17) =560a(18) =680a(19) =715a(20) =792a(21) =816a(22) =924a(23) =969a(24) =1001a(25) =1140a(26) =1287a(27) =1330a(28) =1365a(29) =1540