Q(n,6), where Q(m,k) is defined in A127080 and A127137.

Terms

a(0) =-120a(1) =-15a(2) =48a(3) =75a(4) =72a(5) =45a(6) =0a(7) =-57a(8) =-120a(9) =-183a(10) =-240a(11) =-285a(12) =-312a(13) =-315a(14) =-288a(15) =-225a(16) =-120a(17) =33a(18) =240a(19) =507a(20) =840a(21) =1245a(22) =1728a(23) =2295a(24) =2952a(25) =3705a(26) =4560a(27) =5523a(28) =6600a(29) =7797