Engel expansion for (negative) constant defined in A078756.

Terms

a(0) =-1a(1) =-2a(2) =-3a(3) =-4a(4) =-9a(5) =-11a(6) =-17a(7) =-82a(8) =-86a(9) =-89a(10) =-259a(11) =-1031a(12) =-1493a(13) =-3088a(14) =-18107a(15) =-3128320a(16) =-4245574a(17) =-4431505a(18) =-7141303a(19) =-25396934a(20) =-87452973a(21) =-220313229a(22) =-235578556a(23) =-1892660806a(24) =-5160802315a(25) =-5697316936a(26) =-6909396926a(27) =-17605431920a(28) =-18782195284a(29) =-19291817256