Difference between 2^n and the largest factorial <= 2^n.

Terms

a(0) =0a(1) =0a(2) =2a(3) =2a(4) =10a(5) =8a(6) =40a(7) =8a(8) =136a(9) =392a(10) =304a(11) =1328a(12) =3376a(13) =3152a(14) =11344a(15) =27728a(16) =25216a(17) =90752a(18) =221824a(19) =161408a(20) =685696a(21) =1734272a(22) =565504a(23) =4759808a(24) =13148416a(25) =29925632a(26) =27192064a(27) =94300928a(28) =228518656a(29) =57869312