Graham-Sloane-type lower bound on the size of a ternary (n,3,9) constant-weight code.

Terms

a(0) =27a(1) =244a(2) =1225a(3) =4506a(4) =13559a(5) =35346a(6) =82664a(7) =177494a(8) =355621a(9) =672796a(10) =1212758a(11) =2097452a(12) =3499818a(13) =5659535a(14) =8902155a(15) =13662083a(16) =20509867a(17) =30184333a(18) =43630080a(19) =62040927a(20) =86909874a(21) =120086243a(22) =163840610a(23) =220938240a(24) =294721720a(25) =389203523a(26) =509169290a(27) =660292594a(28) =849262046