a: =proc(n)选项记忆`如果`(n<3,[5,192][n],
((-300307980720421134*n^6-450257143569814251*n^5+520721206232593545*n^4)
+23767576478617990*n^3-244917832991741721*n^2+20947752092648421*n
+7263907687560150)*a(n-2)+(20284627624231332*n^6+74969736339564876*n^5
-90577816139486502*n^4-578021108537112633*n^3-713543105276625459*n^2
-30985589348004634*n-29055630750240600)*a(n-1))/(339337400732270*n^6
+2086412513047793*n^5-1761594949059583*n^4-24340927184757907*n^3
-25005499944921313*n^2+25705682578023740*n+29939073413286900))
结束时间:
seq(a(n),n=1..20);
|