19/02/27 19:14:54.85 FQAnPIcf.net
ってことはこれはもう意味ないのかな？
>>256
a(n)=(81/25)n^2-(2/3)n-(17/40)-((1/60)n^2-(1/10)n-(721/360))(-1)^n
+0.110557281cos(πn/5)-0.105146222sin(πn/5)-1.369207384cos(2πn/5)+(0.016064913n-0.089805595)sin(2πn/5)
+0.289442719cos(3πn/5)+0.170130162sin(3πn/5)+0.169207384cos(4πn/5)+(0.178162618n+0.995959314)sin(4πn/5)
-0.146446609cos(πn/4)-0.560660172sin(πn/4)-0.853553391cos(3πn/4)-1.560660172sin(3πn/4)
+(2/9)cos(πn/3)-0.384900179sin(2πn/3)+sin(πn/2)+sinc(x)+4sinc(x-1)-2sinc(x-2)+2sinc(x-3)-2sinc(x-4)