Order of GL_2(p), the general linear group over F_p, where p runs through the primes.

Terms

a(0) =6a(1) =48a(2) =480a(3) =2016a(4) =13200a(5) =26208a(6) =78336a(7) =123120a(8) =267168a(9) =682080a(10) =892800a(11) =1822176a(12) =2755200a(13) =3337488a(14) =4773696a(15) =7738848a(16) =11908560a(17) =13615200a(18) =19845936a(19) =25048800a(20) =28003968a(21) =38450880a(22) =46879728a(23) =62029440a(24) =87607296a(25) =103020000a(26) =111447648a(27) =129843216a(28) =139851360