The Gauss factorial n_6!.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =5a(6) =5a(7) =35a(8) =35a(9) =35a(10) =35a(11) =385a(12) =385a(13) =5005a(14) =5005a(15) =5005a(16) =5005a(17) =85085a(18) =85085a(19) =1616615a(20) =1616615a(21) =1616615a(22) =1616615a(23) =37182145a(24) =37182145a(25) =929553625a(26) =929553625a(27) =929553625a(28) =929553625a(29) =26957055125