a(n)~n*(A1*log(n)^7+A2*log。
设f(s)=Product_{pprime}(1-9/p^(2*s)+16/p^
A1=f(1)/5040=0.0000097860463451190658257888710039661018239924009134296302566263529129。。。
A2=((8*γ-1)*f(1)+f'(1))/720=0.00070199972261740952617713586535400211997034065833472586220873074052900。。。
A3=(2*f(1)*(1-8*伽玛+28*伽玛^2-8*sg1)+2*(8*伽玛-1)*f'(1)+f'(1))/240=0.017170755726863850415072677764642853353516776541779590118582753709080243。。。
A4=(6*f(1)*(-1-28*伽马^2+56*伽玛^3+伽马*(8-56*sg1)+8*sg1+4*sg2)+6*(1-8*伽马+28*伽玛*2-8*sg 1)*f'(1)+(24*伽马-3)*f''(1)+f''(一))/144=0.1758477246705822314789989372033030657025089743982643862202155788。。。,
其中f(1)=乘积{p素数}(1-9/p^2+16/p^3-9/p^4+1/p^6)=0.04932167357940009176197591008697998915319292170060368536493968186814900。。。,
f'(1)=f(1)*和{p素数}6*(3*p+1)*log(p)/(p+1)*(p^2+4*p+1”)=0.327007532990416629361734888345359495304849714163553152019426434776932。。。,
f''(1)=f'(1)^2/f(1)+f(1。。。,
f“”(1)=3*f“(1)*f“”99327537246287。。。,
其他常数的近似值:
A5=0.7626157870664479996781152281270580148665443022014605423466363134512。。。
A6=1.372091287890594086975369743071441424192833481004753922122458993040。。。
A7=1.1416118168318711437057727816148057614284471759625288073915723140。。。
A8=0.261822176594317142495805116011194524207601991649774700610674747694。。。
(结束)