Expansion of (1 - 2*x^2)/(1 + x)^5. Fourth column of Riordan triangle A248156.

Terms

a(0) =1a(1) =-5a(2) =13a(3) =-25a(4) =40a(5) =-56a(6) =70a(7) =-78a(8) =75a(9) =-55a(10) =11a(11) =65a(12) =-182a(13) =350a(14) =-580a(15) =884a(16) =-1275a(17) =1767a(18) =-2375a(19) =3115a(20) =-4004a(21) =5060a(22) =-6302a(23) =7750a(24) =-9425a(25) =11349a(26) =-13545a(27) =16037a(28) =-18850a(29) =22010