Values of C(n,3) which can be written as C(x,3) + C(y,3).

Terms

a(0) =20a(1) =680a(2) =29260a(3) =34220a(4) =70300a(5) =221815a(6) =227920a(7) =287980a(8) =467180a(9) =908600a(10) =2481115a(11) =4278680a(12) =12259940a(13) =13813570a(14) =15493204a(15) =17861900a(16) =19970444a(17) =24672560a(18) =25665020a(19) =27880600a(20) =29742164a(21) =34055980a(22) =44722580