Alternating row sums of triangle A134830.

Terms

a(0) =1a(1) =1a(2) =2a(3) =0a(4) =12a(5) =-26a(6) =312a(7) =-1338a(8) =16684a(9) =-104994a(10) =1463904a(11) =-12138218a(12) =190104132a(13) =-1956240066a(14) =34206491416a(15) =-420374124426