Shifts 3 places left under inverse binomial transform.

Terms

a(0) =1a(1) =2a(2) =4a(3) =1a(4) =1a(5) =1a(6) =-6a(7) =14a(8) =-25a(9) =32a(10) =6a(11) =-250a(12) =1222a(13) =-4380a(14) =13059a(15) =-31705a(16) =48464a(17) =76354a(18) =-1159911a(19) =7041015a(20) =-33400183a(21) =135931668a(22) =-473704510a(23) =1277600695a(24) =-1233828142a(25) =-16196871172a(26) =169736941512