Sum of squared terms in rows of triangle A227311.

Terms

a(0) =4a(1) =16a(2) =64a(3) =320a(4) =1424a(5) =6400a(6) =28928a(7) =131328a(8) =599428a(9) =2746176a(10) =12627520a(11) =58237952a(12) =269284240a(13) =1247921152a(14) =5794490624a(15) =26952340480a(16) =125559053904a(17) =585733448080