a(n) = 8*7*6*5*4*3*2*1 - 16*15*14*13*12*11*10*9 + 24*23*22*21*20*19*18*17 - ... + (up to the n-th term).

A319891

a(n) = 8*7*6*5*4*3*2*1 - 16*15*14*13*12*11*10*9 + 24*23*22*21*20*19*18*17 - ... + (up to the n-th term).

Terms

    a(0) =8a(1) =56a(2) =336a(3) =1680a(4) =6720a(5) =20160a(6) =40320a(7) =40320a(8) =40304a(9) =40080a(10) =36960a(11) =-3360a(12) =-483840a(13) =-5725440a(14) =-57617280a(15) =-518878080a(16) =-518878056a(17) =-518877528a(18) =-518865936a(19) =-518623056a(20) =-513777600a(21) =-421968960a(22) =1225486080a(23) =29135312640a(24) =29135312608a(25) =29135311648a(26) =29135282880

External references