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a(n) = A050443(n-th prime)/(n-th prime).
3

%I #12 Mar 04 2019 10:36:00

%S 0,1,0,1,1,1,2,2,4,11,16,43,87,123,250,736,2189,3152,9501,19909,28861,

%T 88250,186540,575703,2605063,5556059,8118935,17356074,25389718,

%U 54388168,789812633,1700415401,5380882786,7903301746,54185536387,79678647536,253610377475

%N a(n) = A050443(n-th prime)/(n-th prime).

%H Seiichi Manyama, <a href="/A052338/b052338.txt">Table of n, a(n) for n = 1..1000</a>

%o (PARI) a(n) = my(p = prime(n)); polcoef((4-x^3)/(1-x^3-x^4) + O(x^(p+1)), p)/p; \\ _Michel Marcus_, Mar 04 2019

%Y Cf. A000040, A001608, A050443.

%K easy,nonn

%O 1,7

%A _Christian G. Bower_, Dec 23 1999

%E Corrected by _Seiichi Manyama_, Mar 04 2019