Antidiagonal sums of number triangle A106270.

Terms

a(0) =1a(1) =-1a(2) =-1a(3) =-6a(4) =-15a(5) =-48a(6) =-147a(7) =-477a(8) =-1577a(9) =-5339a(10) =-18373a(11) =-64125a(12) =-226385a(13) =-807025a(14) =-2900825a(15) =-10501870a(16) =-38258495a(17) =-140146660a(18) =-515897195a(19) =-1907409850a(20) =-7080017615a(21) =-26373676870a(22) =-98562581255a(23) =-369433290520