a(n) = sin( arcsin(n)- 2*arccos(n) )^2.

Terms

a(0) =0a(1) =1a(2) =676a(3) =9801a(4) =59536a(5) =235225a(6) =715716a(7) =1825201a(8) =4096576a(9) =8346321a(10) =15760900a(11) =27994681a(12) =47279376a(13) =76545001a(14) =119552356a(15) =181037025a(16) =266864896a(17) =384199201a(18) =541679076a(19) =749609641a(20) =1020163600a(21) =1367594361a(22) =1808460676a(23) =2361862801a(24) =3049690176a(25) =3896880625a(26) =4931691076