Number of edges in 7-partite Turán graph of order n.

Terms

a(0) =0a(1) =0a(2) =1a(3) =3a(4) =6a(5) =10a(6) =15a(7) =21a(8) =27a(9) =34a(10) =42a(11) =51a(12) =61a(13) =72a(14) =84a(15) =96a(16) =109a(17) =123a(18) =138a(19) =154a(20) =171a(21) =189a(22) =207a(23) =226a(24) =246a(25) =267a(26) =289a(27) =312a(28) =336a(29) =360