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G.f.:A(x)=2*(1+x^5)/() / (1+x+sqrt((( (1+x)^2--4*x*(1+x^5))).) )).
通用:A(x) =2*(1+x^5)/(1+x+平方英尺((1+x)^2-4*x*(1+x) =^5))).
G.f.:A(x)=
囊性纤维变性。A001006号,A023426号,A025246号,A357308型.
a(n)=和{k=0..floor(n/5)}二项式(n-4*k-1,n-5*k)*二项式。
1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 4, 7, 11, 16, 22, 31, 47, 76, 126, 207, 331, 517, 801,1251,1987,3206,5212,8465,13677,21997,35341,56937,92169,149860,244274,398383,649379,1058055,1724575,2814475,4600923,7533150,12347908,20252837,33230545